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All questions of Statistics for Economics for Commerce Exam
Identify the correct statement.
- a)Statistics finds economic relationships using data and verifies them.
- b)Statistics provides tools which are used to predict future value.
- c)Statistical methods help in analysing economic problems.
- d)All of the above
Correct answer is option 'D'. Can you explain this answer?
Identify the correct statement.
a)
Statistics finds economic relationships using data and verifies them.
b)
Statistics provides tools which are used to predict future value.
c)
Statistical methods help in analysing economic problems.
d)
All of the above
|
Kiran Mehta answered |
Correct Answer :- d
Explanation : All the statements are correct.
Statistics in economics deals with numbers and is quantitative. Qualitative adjectives like rich, poor, tall etc. have no attached significance in the statistical universe.
Statistics provides tools which are used to predict future value
Statistics only deals with quantitative data it does not deal well with qualitative data beauty, honesty, goodwill etc can’t be measured.
Statistics is an indispensable tool for studying and understanding the economic problems of a country.It helps in analysing economic problems such as production, consumption, pricing, income distribution, population, unemployment and poverty.
Primary data is gathered through- a)original source of information.
- b)information on website.
- c)second hand information.
- d)annual company reports.
Correct answer is option 'A'. Can you explain this answer?
Primary data is gathered through
a)
original source of information.
b)
information on website.
c)
second hand information.
d)
annual company reports.
|
Bhargavi Chopra answered |
A primary data source is an original data source, that is, one in which the data are collected firsthand by the researcher for a specific research purpose or project. Primary data collection is quite expensive and time consuming compared to secondary
Value that divides the series into hundred equal parts is called- a)percentile.
- b)quartiles.
- c)deciles.
- d)octiles.
Correct answer is option 'A'. Can you explain this answer?
Value that divides the series into hundred equal parts is called
a)
percentile.
b)
quartiles.
c)
deciles.
d)
octiles.
|
|
Kiran Mehta answered |
Values that divide the series into hundred equal parts are called percentiles. In percentile, we get 99 dividing positions denoted by P1, P2,……..,P99.
Orderly arrangement of data according to magnitude is called- a)raw series.
- b)individual series.
- c)original series.
- d)listed series.
Correct answer is option 'B'. Can you explain this answer?
Orderly arrangement of data according to magnitude is called
a)
raw series.
b)
individual series.
c)
original series.
d)
listed series.
|
Ishan Choudhury answered |
When the raw data is presented individually in the form of a series, it is called an individual series.
In simple words, individual series is the arrangement of raw data individually. It gives numeric values for a specific situation.
In an individual series items are shown separately. So organisation on the basis of magnitude is individual series.
The process of buying goods by consumers to satisfy their various needs is- a)satisfaction
- b)utility
- c)consumption
- d)production
Correct answer is option 'C'. Can you explain this answer?
The process of buying goods by consumers to satisfy their various needs is
a)
satisfaction
b)
utility
c)
consumption
d)
production
|
Vikas Kapoor answered |
- Consumption, defined as spending for acquisition of utility, is a major concept in economics and is also studied in many other social sciences.
- It is seen in contrast to investing, which is spending for acquisition of future income.
- Consumption, in economics, the use of goods and services by households.
- Consumption is distinct from consumption expenditure, which is the purchase of goods and services for use by households.
There should be free education provided to poor. It is an example of- a)positive science
- b)normative science
- c)economics as an art
- d)science
Correct answer is option 'B'. Can you explain this answer?
There should be free education provided to poor. It is an example of
a)
positive science
b)
normative science
c)
economics as an art
d)
science
|
Naina Sharma answered |
There should be free education given to poor. It is an example of normative science as it deals with what should be.
Select the incorrect statement with regard to the study of economics.- a)The study of consumption
- b)The study of production
- c)The study of distribution
- d)The study of investment
Correct answer is option 'D'. Can you explain this answer?
Select the incorrect statement with regard to the study of economics.
a)
The study of consumption
b)
The study of production
c)
The study of distribution
d)
The study of investment
|
Om Desai answered |
Economics is generally discussed in three parts: consumption, production and distribution.
After collection of data, the next step is- a)presentation of data.
- b)classification of data.
- c)selection of data.
- d)categorising of data.
Correct answer is option 'B'. Can you explain this answer?
After collection of data, the next step is
a)
presentation of data.
b)
classification of data.
c)
selection of data.
d)
categorising of data.
|
|
Naina Sharma answered |
Classification is the process of arranging data into different groups or classes.
► Classification of data is done after collection of data.
The population divided into several homogeneous groups is called
a)Deliberate samplingb)Systematic samplingc)Stratified samplingd)Convenience samplingCorrect answer is option 'C'. Can you explain this answer?
|
|
Kiran Mehta answered |
The correct option is Option C.
Stratified random sampling involves dividing the entire population into homogeneous groups called strata.
Data collected from the original source of information is called- a)primary data.
- b)secondary data.
- c)published data.
- d)used data.
Correct answer is option 'A'. Can you explain this answer?
Data collected from the original source of information is called
a)
primary data.
b)
secondary data.
c)
published data.
d)
used data.
|
Arun Yadav answered |
These are collected from the very source of information. They are collected for the first time from the original source of information.
Which of the following is not a measure of central tendency?- a)Mean
- b)Median
- c)Standard deviation
- d)Mode
Correct answer is option 'C'. Can you explain this answer?
Which of the following is not a measure of central tendency?
a)
Mean
b)
Median
c)
Standard deviation
d)
Mode
|
|
Om Desai answered |
► Standard deviation is the measure of how spread out the numbers of a data are.
► Mean is the average.
► Median is the middle number, when data is arranged in numerical order.
► Mode is the data item the appears most frequently.
Mean, median and mode are all measures of central tendencies.
Persons doing a particular job are called- a)producers.
- b)businessmen.
- c)service holders.
- d)employers.
Correct answer is option 'C'. Can you explain this answer?
Persons doing a particular job are called
a)
producers.
b)
businessmen.
c)
service holders.
d)
employers.
|
|
Vikas Kapoor answered |
In a job, we work for some other person and are paid for our services. Thus, persons engaged in a particular job are called service holders.
Data can be represented in
- a)one way.
- b)two ways.
- c)four ways.
- d)three ways.
Correct answer is option 'D'. Can you explain this answer?
Data can be represented in
a)
one way.
b)
two ways.
c)
four ways.
d)
three ways.
|
|
Pranjli Dixit answered |
Two ways
first as primary data
and second as secondary data
first as primary data
and second as secondary data
On the basis of presence and absence of an attribute, data are classified into- a)one fold classification.
- b)two fold classification.
- c)three fold classification.
- d)four fold classification.
Correct answer is option 'B'. Can you explain this answer?
On the basis of presence and absence of an attribute, data are classified into
a)
one fold classification.
b)
two fold classification.
c)
three fold classification.
d)
four fold classification.
|
Sunil Chahar answered |
When on the basis presence and absence of an attribute, the data are classified into two classes, one possessing that attribute and the other not possessing that attribute, it is called two-fold classification.
Dividing population into several homogeneous groups for data collection is called- a)deliberate sampling.
- b)stratified sampling.
- c)systematic sampling.
- d)convenience sampling.
Correct answer is option 'C'. Can you explain this answer?
Dividing population into several homogeneous groups for data collection is called
a)
deliberate sampling.
b)
stratified sampling.
c)
systematic sampling.
d)
convenience sampling.
|
|
Ishan Choudhury answered |
The population is divided into homogeneous groups on the basis of their characteristics. It is called systematic sampling.
Arithmetic mean is of- a)two types.
- b)three types.
- c)four types.
- d)five types.
Correct answer is option 'A'. Can you explain this answer?
Arithmetic mean is of
a)
two types.
b)
three types.
c)
four types.
d)
five types.
|
Tejas Verma answered |
Arithmetic mean is of two types:
- Simple arithmetic mean
- Weighted mean.
To calculate purchasing power of money and real wages we use- a)income index.
- b)consumer price index.
- c)wholesale price index.
- d)retail price index.
Correct answer is option 'B'. Can you explain this answer?
To calculate purchasing power of money and real wages we use
a)
income index.
b)
consumer price index.
c)
wholesale price index.
d)
retail price index.
|
|
Aryan Khanna answered |
Consumer price index number or cost of living index helps in measuring the changes in the purchasing power of money and real income.
Direction: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:Assertion (A): For calculating Arithmetic mean, when Cumulative frequencies are given, the frequencies are to be found for the given series or variables.Reason (R): Cumulative frequencies are calculated by adding the frequencies.- a)Both Assertion (A) and Reason (R) are true, and Reason (R) is the correct explanation of the Assertion (A).
- b)Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
- c)Assertion (A) is true, but Reason (R) is false.
- d)Assertion (A) is false, but Reason (R) is true.
Correct answer is option 'B'. Can you explain this answer?
Direction: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:
Assertion (A): For calculating Arithmetic mean, when Cumulative frequencies are given, the frequencies are to be found for the given series or variables.
Reason (R): Cumulative frequencies are calculated by adding the frequencies.
a)
Both Assertion (A) and Reason (R) are true, and Reason (R) is the correct explanation of the Assertion (A).
b)
Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
c)
Assertion (A) is true, but Reason (R) is false.
d)
Assertion (A) is false, but Reason (R) is true.
|
|
Arun Yadav answered |
The arithmetic mean of the following observation 4, 8, 12, 16, is 10. 3. Cumulative frequency is needed while finding the median of the distribution. In case of calculation of median after arranging the data in ascending or descending order, the cumulative frequencies are calculated.
Match the column I and II and choose the correct pair of statements:
- a)(iv)-(a), (i)-(b), (iii)-(c) and (ii)-(d)
- b)(iv)-(a), (i)-(b), (ii)-(c) and (iii)-(d)
- c)(iv)-(a), (iii)-(b), (ii)-(c) and (i)-(d)
- d)(iv)-(a), (ii)-(b), (iii)-(c) and (i)-(d)
Correct answer is option 'C'. Can you explain this answer?
Match the column I and II and choose the correct pair of statements:
a)
(iv)-(a), (i)-(b), (iii)-(c) and (ii)-(d)
b)
(iv)-(a), (i)-(b), (ii)-(c) and (iii)-(d)
c)
(iv)-(a), (iii)-(b), (ii)-(c) and (i)-(d)
d)
(iv)-(a), (ii)-(b), (iii)-(c) and (i)-(d)
|
Sai Kulkarni answered |
A farmer is a person engaged in agriculture, raising living organisms for food or raw materials.So he is a producer .
A shopkeeper is an individual who owns or runs a shop.A shopkeeper sells some items. So he is a seller.
A service holder is a person who takes service or that he is working under someone. This means employee and the service provider is the person who gives job(employer). So service holder is employee.
A service provider is a company that provides organizations with consulting, legal, real estate, education, communications, storage, processing, transport, and many other services. So the service provider is the cab driver.
More than one attribute are present simultaneously in case of- a)qualitative classification.
- b)quantitative classification.
- c)manifold classification.
- d)chronological classification.
Correct answer is option 'C'. Can you explain this answer?
More than one attribute are present simultaneously in case of
a)
qualitative classification.
b)
quantitative classification.
c)
manifold classification.
d)
chronological classification.
|
|
Vikas Kapoor answered |
In manifold classification, two or more attributes are considered simultaneously. When more attributes are involved, the data would be classified into several classes and subclasses depending on the number of attributes.
For example, the population in a country can be classified in terms of gender as male and female.
For example, the population in a country can be classified in terms of gender as male and female.
The correct option is Option C
Classification of data is the grouping of raw data under different- a)headings
- b)rows
- c)columns
- d)tables
Correct answer is option 'A'. Can you explain this answer?
Classification of data is the grouping of raw data under different
a)
headings
b)
rows
c)
columns
d)
tables
|
|
Vikas Kapoor answered |
Classification is concerned with the division of the data into various groups and sub groups.
► Data is classified into groups of different headings.
Identify the correct pair of items from the following Columns I and II:
- a)A–1
- b)B–2
- c)C–3
- d)D–4
Correct answer is option 'B'. Can you explain this answer?
Identify the correct pair of items from the following Columns I and II:
a)
A–1
b)
B–2
c)
C–3
d)
D–4
|
|
Amita Das answered |
Correct formulas are:
A. Median: 
B. Mode: 
C. Mean: 
D. Lower Quartile: (N + 1) * 1 / 4
Which of the following is/are an example/s of weighted price index?
(a) Consumer price index
(b) Wholesale price index
(c) Sensex- a)(a) and (b)
- b)(b) and (c)
- c)Only (a)
- d)All (a), (b) and (c)
Correct answer is option 'D'. Can you explain this answer?
Which of the following is/are an example/s of weighted price index?
(a) Consumer price index
(b) Wholesale price index
(c) Sensex
(a) Consumer price index
(b) Wholesale price index
(c) Sensex
a)
(a) and (b)
b)
(b) and (c)
c)
Only (a)
d)
All (a), (b) and (c)
|
Gaurav Kumar answered |
The following are examples of weighted price index:
(a) Consumer price index
(b) Wholesale price index
(c) Sensex
(a) Consumer price index
(b) Wholesale price index
(c) Sensex
The quantitative character of an item is shown by- a)attributes.
- b)variables.
- c)figures.
- d)tables.
Correct answer is option 'B'. Can you explain this answer?
The quantitative character of an item is shown by
a)
attributes.
b)
variables.
c)
figures.
d)
tables.
|
Poonam Reddy answered |
Heights and weights of individuals are variables as they can be measured in numerical terms. Thus, variables are used when changing characterstics are numerically measured.
The mathematical average is also called- a)median.
- b)mode.
- c)mean.
- d)quartile.
Correct answer is option 'C'. Can you explain this answer?
The mathematical average is also called
a)
median.
b)
mode.
c)
mean.
d)
quartile.
|
|
Tejas Verma answered |
► Mean is a mathematical average.
The arithmetic mean or mean is defined as the sum of values of a group of items divided by the number of items. It is denoted by mean.
In case the interviewer is unable to contact a person, it is called- a)sampling bias.
- b)non-response error.
- c)non-sampling error.
- d)error of calculation.
Correct answer is option 'B'. Can you explain this answer?
In case the interviewer is unable to contact a person, it is called
a)
sampling bias.
b)
non-response error.
c)
non-sampling error.
d)
error of calculation.
|
Puja Das answered |
Non-response errors occur when the respondent refuses to respond or the person refuses to provide information.
Each given interval is called a- a)frequency.
- b)series.
- c)class.
- d)distribution.
Correct answer is option 'C'. Can you explain this answer?
Each given interval is called a
a)
frequency.
b)
series.
c)
class.
d)
distribution.
|
|
Poonam Reddy answered |
Difference between upper and lower class limit is called class interval.
For example, 0-10, 10-20, 20-30 etc.
Qualitative expressions are outside the scope of statistics unless they are expressed in
- a)Quantitative terms
- b)Algebraic terms
- c)Qualitative terms
- d)Java terms
Correct answer is option 'A'. Can you explain this answer?
Qualitative expressions are outside the scope of statistics unless they are expressed in
a)
Quantitative terms
b)
Algebraic terms
c)
Qualitative terms
d)
Java terms
|
Fatema Dholkawala Dholka answered |
Correct answer is c
statistics only deals with numbers.
it ignores qualitative aspects of the data
statistics only deals with numbers.
it ignores qualitative aspects of the data
The subject that helps in analysing economic problems and formulating policies to solve them is- a)Physics.
- b)Chemistry
- c)Mathematics.
- d)Statistics.
Correct answer is option 'D'. Can you explain this answer?
The subject that helps in analysing economic problems and formulating policies to solve them is
a)
Physics.
b)
Chemistry
c)
Mathematics.
d)
Statistics.
|
Sanjeev Kumar answered |
Statistics helps in analysing economic problems and formulating policies to solve them. Statistics is the study of aggregate of facts numerically expressed.
People engaged in adding value to the matter are called- a)consumers
- b)sellers
- c)producers
- d)service provider
Correct answer is option 'C'. Can you explain this answer?
People engaged in adding value to the matter are called
a)
consumers
b)
sellers
c)
producers
d)
service provider
|
Raman Singh answered |
A producer produces goods for consumption. The process of adding value to a matter is known as production.
In singular sense statistics is- a)applied science.
- b)descriptive science.
- c)social science.
- d)normative science.
Correct answer is option 'A'. Can you explain this answer?
In singular sense statistics is
a)
applied science.
b)
descriptive science.
c)
social science.
d)
normative science.
|
|
Aryan Khanna answered |
In singular sense the term statistics means statistical methods. Statistics is an applied science in singular sense.
The sign of the correlation is determined by the- a)standard deviation.
- b)covariance between X and Y.
- c)X variable.
- d)Y variable.
Correct answer is option 'B'. Can you explain this answer?
The sign of the correlation is determined by the
a)
standard deviation.
b)
covariance between X and Y.
c)
X variable.
d)
Y variable.
|
Kalyan Desai answered |
The sign of covariance between X and Y determines the sign of the correlation coefficient. The value of r does not contain any unit.
Which of the following is not a manifestations of scarcity?- a)Long queues at railway booking counters
- b)Crowded buses
- c)Shortage of essential commodities
- d)Sunlight
Correct answer is option 'D'. Can you explain this answer?
Which of the following is not a manifestations of scarcity?
a)
Long queues at railway booking counters
b)
Crowded buses
c)
Shortage of essential commodities
d)
Sunlight
|
Hardik Handa answered |
The examples of scarcity are long queues at railway booking counters, crowded buses and trains, shortage of essential commodities etc.
Which of the following is correct regarding Statistics?- a)Aggregate of facts
- b)Numerically expressed
- c)Affected by multiplicity of causes
- d)All of these
Correct answer is option 'D'. Can you explain this answer?
Which of the following is correct regarding Statistics?
a)
Aggregate of facts
b)
Numerically expressed
c)
Affected by multiplicity of causes
d)
All of these
|
Bhargavi Roy answered |
The correct answer is option 'D': All of these.
Statistics is a branch of mathematics that deals with the collection, organization, analysis, interpretation, and presentation of data. It involves the use of quantitative methods to gather information, make inferences, and draw conclusions about a population based on a sample.
Aggregate of facts:
Statistics involves the collection of data, which can be considered as an aggregate of facts. These facts can be collected through various methods such as surveys, experiments, observations, or existing records. The collected data is then organized and analyzed to extract meaningful information and draw conclusions.
Numerically expressed:
Statistics uses numerical methods to express and represent data. Data can be presented in the form of numbers, percentages, ratios, graphs, charts, or tables. Numerical representations help to quantify and measure various characteristics, trends, and patterns in the data.
Affected by multiplicity of causes:
Statistics recognizes that multiple factors or causes can influence the phenomena being studied. It takes into account the complex nature of real-world situations where multiple variables interact and affect the outcomes. Statistical analysis allows for the identification and understanding of the relationships and interactions between these factors.
Explanation:
Option 'D' is correct because it encompasses all the key aspects of statistics. Statistics deals with the collection and analysis of data, which can be considered as an aggregate of facts. It uses numerical methods to express and represent data, allowing for quantitative analysis. Additionally, statistics recognizes that phenomena are influenced by a multiplicity of causes, taking into account the complexity of real-world situations.
Statistics is a vital tool in various fields such as business, economics, medicine, social sciences, and many others. It helps in making informed decisions, identifying trends and patterns, testing hypotheses, and predicting future outcomes. The use of statistical techniques enables researchers, analysts, and decision-makers to understand and interpret data, draw valid conclusions, and communicate their findings effectively.
In conclusion, statistics plays a crucial role in understanding and interpreting data. It involves the collection, organization, analysis, and presentation of data using numerical methods. It recognizes the complexity of real-world situations and considers the multiplicity of causes that can influence the phenomena being studied. Therefore, the correct answer is option 'D': All of these.
Statistics is a branch of mathematics that deals with the collection, organization, analysis, interpretation, and presentation of data. It involves the use of quantitative methods to gather information, make inferences, and draw conclusions about a population based on a sample.
Aggregate of facts:
Statistics involves the collection of data, which can be considered as an aggregate of facts. These facts can be collected through various methods such as surveys, experiments, observations, or existing records. The collected data is then organized and analyzed to extract meaningful information and draw conclusions.
Numerically expressed:
Statistics uses numerical methods to express and represent data. Data can be presented in the form of numbers, percentages, ratios, graphs, charts, or tables. Numerical representations help to quantify and measure various characteristics, trends, and patterns in the data.
Affected by multiplicity of causes:
Statistics recognizes that multiple factors or causes can influence the phenomena being studied. It takes into account the complex nature of real-world situations where multiple variables interact and affect the outcomes. Statistical analysis allows for the identification and understanding of the relationships and interactions between these factors.
Explanation:
Option 'D' is correct because it encompasses all the key aspects of statistics. Statistics deals with the collection and analysis of data, which can be considered as an aggregate of facts. It uses numerical methods to express and represent data, allowing for quantitative analysis. Additionally, statistics recognizes that phenomena are influenced by a multiplicity of causes, taking into account the complexity of real-world situations.
Statistics is a vital tool in various fields such as business, economics, medicine, social sciences, and many others. It helps in making informed decisions, identifying trends and patterns, testing hypotheses, and predicting future outcomes. The use of statistical techniques enables researchers, analysts, and decision-makers to understand and interpret data, draw valid conclusions, and communicate their findings effectively.
In conclusion, statistics plays a crucial role in understanding and interpreting data. It involves the collection, organization, analysis, and presentation of data using numerical methods. It recognizes the complexity of real-world situations and considers the multiplicity of causes that can influence the phenomena being studied. Therefore, the correct answer is option 'D': All of these.
With regards to distrust of Statistics which of the following statements is not correct?- a)Statistics is a rainbow of lies
- b)Statistics are tissues of falsehood
- c)Statistics express the facts in numbers
- d)There are three kinds of lies-lies, damned lies and statistics
Correct answer is option 'C'. Can you explain this answer?
With regards to distrust of Statistics which of the following statements is not correct?
a)
Statistics is a rainbow of lies
b)
Statistics are tissues of falsehood
c)
Statistics express the facts in numbers
d)
There are three kinds of lies-lies, damned lies and statistics
|
Nipun Tuteja answered |
To understand distrust in statistics, consider:
- A, B, D: These statements reflect skepticism and distrust towards how statistics can be manipulated or misrepresented, often seen in phrases like "lies, damned lies, and statistics."
- C: This is the correct statement, as it describes the objective nature of statistics—expressing facts in numerical form. It does not imply deception or manipulation.
Therefore, statement C is not associated with distrust of statistics.
The statistics is concerned with:- a)Aggregate of organised facts
- b)Aggregate of disorganised facts
- c)Aggregate of useless facts
- d)Aggregate of unrelated facts
Correct answer is option 'A'. Can you explain this answer?
The statistics is concerned with:
a)
Aggregate of organised facts
b)
Aggregate of disorganised facts
c)
Aggregate of useless facts
d)
Aggregate of unrelated facts
|
|
Nipun Tuteja answered |
Statistics is fundamentally concerned with:
- Aggregate of organised facts: Statistics involves the collection, analysis, interpretation, presentation, and organization of data. To derive meaningful insights, data must be systematically collected and organized.
- Organized facts allow for patterns and trends to be identified, enabling informed decision-making.
- Disorganized, useless, or unrelated facts do not provide reliable information for statistical analysis.
Thus, the correct answer is option A: Aggregate of organised facts.
Direction: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:Assertion (A): The Index Number shows the change in the relative price from the base year.Reason (R): Index number is calculated as a ratio of current price with the base price.- a)Both Assertion (A) and Reason (R) are true, and Reason (R) is the correct explanation of the Assertion (A).
- b)Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
- c)Assertion (A) is true, but Reason (R) is false.
- d)Assertion (A) is false, but Reason (R) is true.
Correct answer is option 'B'. Can you explain this answer?
Direction: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:
Assertion (A): The Index Number shows the change in the relative price from the base year.
Reason (R): Index number is calculated as a ratio of current price with the base price.
a)
Both Assertion (A) and Reason (R) are true, and Reason (R) is the correct explanation of the Assertion (A).
b)
Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
c)
Assertion (A) is true, but Reason (R) is false.
d)
Assertion (A) is false, but Reason (R) is true.
|
|
Ishan Choudhury answered |
Index number in statistics is the measurement of change in a variable or variables across a determined period. It will show general relative change and not a directly measurable figure. An index number is expressed in percentage form.
Direction: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:Assertion (A): Mode is dependent on frequencies.Reason (R): Mode has very less effect of marginal units.- a)Both Assertion (A) and Reason (R) are true, and Reason (R) is the correct explanation of the Assertion (A).
- b)Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
- c)Assertion (A) is true, but Reason (R) is false.
- d)Assertion (A) is false, but Reason (R) is true.
Correct answer is option 'B'. Can you explain this answer?
Direction: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:
Assertion (A): Mode is dependent on frequencies.
Reason (R): Mode has very less effect of marginal units.
a)
Both Assertion (A) and Reason (R) are true, and Reason (R) is the correct explanation of the Assertion (A).
b)
Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
c)
Assertion (A) is true, but Reason (R) is false.
d)
Assertion (A) is false, but Reason (R) is true.
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Priyanka Khatri answered |
The mode is easy to understand and calculate. The mode is not affected by extreme values. The mode is easy to identify in a data set and in a discrete frequency distribution. The mode is useful for qualitative data. The mode can be computed in an open-ended frequency table.
Direction: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:Assertion (A): Less than or more than ogive can be used to calculate correlation.Reason (R): When changes in two related variables are in the same ratio, then it is a case of perfect correlation.- a)Both Assertion (A) and Reason (R) are true, and Reason (R) is the correct explanation of the Assertion (A).
- b)Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
- c)Assertion (A) is true, but Reason (R) is false.
- d)Assertion (A) is false, but Reason (R) is true.
Correct answer is option 'D'. Can you explain this answer?
Direction: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:
Assertion (A): Less than or more than ogive can be used to calculate correlation.
Reason (R): When changes in two related variables are in the same ratio, then it is a case of perfect correlation.
a)
Both Assertion (A) and Reason (R) are true, and Reason (R) is the correct explanation of the Assertion (A).
b)
Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
c)
Assertion (A) is true, but Reason (R) is false.
d)
Assertion (A) is false, but Reason (R) is true.
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Priyanka Khatri answered |
If the ratio of change between two variable is not constant i.e. change in one variable leads to a change in another variable but by different amount or when all the points in the scatter diagram tends to lie around a smooth curve.
A self-addressed and stamped envelope should be enclosed with a questionnaire is called- a)offer letter
- b)appointment letter
- c)covering letter
- d)resignation letter
Correct answer is option 'C'. Can you explain this answer?
A self-addressed and stamped envelope should be enclosed with a questionnaire is called
a)
offer letter
b)
appointment letter
c)
covering letter
d)
resignation letter
|
|
Priyanka Khatri answered |
A cover letter accompanies or transmits another document such as a survey questionnaire. Its purpose is to alert the respondent about the questionnaire it accompanies and to provide the details of requested actions on the part of the respondent. A cover letter is a living document that often accompanies a resume.
Statistical data can be presented in- a)one form.
- b)two forms.
- c)three forms.
- d)four forms.
Correct answer is option 'C'. Can you explain this answer?
Statistical data can be presented in
a)
one form.
b)
two forms.
c)
three forms.
d)
four forms.
|
Aditya Kumar The Best answered |
Statistical data can be presented in three forms namely, tabular presentation, diagrammatic presentation and graphic presentation.
Arrangement of data into different groups is known as- a)collection of data
- b)presentation of data.
- c)pictograph
- d)classification
Correct answer is option 'D'. Can you explain this answer?
Arrangement of data into different groups is known as
a)
collection of data
b)
presentation of data.
c)
pictograph
d)
classification
|
|
Om Desai answered |
Classification is the process of arranging things (either actually or notionally) in the groups according to their resemblances and affinities and gives expression to the unity of attributes that may subsist amongst a diversity of individuals.
Let x be the mean of squares of first n natural numbers and y be the square of mean of first n natural numbers. If x/y = 55/42, then what is the value of n ?- a)24
- b)25
- c)27
- d)30
Correct answer is option 'C'. Can you explain this answer?
Let x be the mean of squares of first n natural numbers and y be the square of mean of first n natural numbers. If x/y = 55/42, then what is the value of n ?
a)
24
b)
25
c)
27
d)
30
|
Tejas Desai answered |
Given:
Let x be the mean of squares of the first n natural numbers.
Let y be the square of the mean of the first n natural numbers.
It is given that x/y = 55/42.
To Find:
The value of n.
Explanation:
Let's start by finding the values of x and y.
Finding the value of x:
The squares of the first n natural numbers are 1^2, 2^2, 3^2, ..., n^2.
The sum of these squares can be expressed as:
x = 1^2 + 2^2 + 3^2 + ... + n^2
Using the formula for the sum of squares, we can rewrite this as:
x = n(n + 1)(2n + 1)/6
Finding the value of y:
The mean of the first n natural numbers is the sum of the numbers divided by n.
The sum of the first n natural numbers can be expressed as:
sum = 1 + 2 + 3 + ... + n
Using the formula for the sum of an arithmetic series, we can rewrite this as:
sum = n(n + 1)/2
The mean is sum/n, so we can write the mean as:
mean = n(n + 1)/2n = (n + 1)/2
The square of the mean is:
y = (mean)^2 = [(n + 1)/2]^2 = (n + 1)^2/4
Calculating x/y:
Now, we can calculate x/y using the values we found for x and y:
x/y = (n(n + 1)(2n + 1)/6) / ((n + 1)^2/4)
Simplifying this expression:
x/y = (4n(n + 1)(2n + 1)) / (6(n + 1)^2)
x/y = (4n(2n + 1)) / (6(n + 1))
x/y = (2n(2n + 1)) / (3(n + 1))
Given that x/y = 55/42, we can set up the equation:
(2n(2n + 1)) / (3(n + 1)) = 55/42
Solving the equation:
Cross multiplying:
42 * 2n(2n + 1) = 55 * 3(n + 1)
84n(2n + 1) = 165(n + 1)
168n^2 + 84n = 165n + 165
168n^2 - 81n - 165 = 0
Factoring the quadratic equation:
(8n - 11)(21n + 15) = 0
Setting each factor to zero and solving for n:
8n - 11 = 0 or 21n + 15 = 0
8n = 11 or 21n = -15
n = 11/8 or n = -15/21
Since n represents the number of natural numbers, it cannot be negative. Therefore, n = 11/8 is not a valid solution.
Conclusion:
The valid solution for n
Let x be the mean of squares of the first n natural numbers.
Let y be the square of the mean of the first n natural numbers.
It is given that x/y = 55/42.
To Find:
The value of n.
Explanation:
Let's start by finding the values of x and y.
Finding the value of x:
The squares of the first n natural numbers are 1^2, 2^2, 3^2, ..., n^2.
The sum of these squares can be expressed as:
x = 1^2 + 2^2 + 3^2 + ... + n^2
Using the formula for the sum of squares, we can rewrite this as:
x = n(n + 1)(2n + 1)/6
Finding the value of y:
The mean of the first n natural numbers is the sum of the numbers divided by n.
The sum of the first n natural numbers can be expressed as:
sum = 1 + 2 + 3 + ... + n
Using the formula for the sum of an arithmetic series, we can rewrite this as:
sum = n(n + 1)/2
The mean is sum/n, so we can write the mean as:
mean = n(n + 1)/2n = (n + 1)/2
The square of the mean is:
y = (mean)^2 = [(n + 1)/2]^2 = (n + 1)^2/4
Calculating x/y:
Now, we can calculate x/y using the values we found for x and y:
x/y = (n(n + 1)(2n + 1)/6) / ((n + 1)^2/4)
Simplifying this expression:
x/y = (4n(n + 1)(2n + 1)) / (6(n + 1)^2)
x/y = (4n(2n + 1)) / (6(n + 1))
x/y = (2n(2n + 1)) / (3(n + 1))
Given that x/y = 55/42, we can set up the equation:
(2n(2n + 1)) / (3(n + 1)) = 55/42
Solving the equation:
Cross multiplying:
42 * 2n(2n + 1) = 55 * 3(n + 1)
84n(2n + 1) = 165(n + 1)
168n^2 + 84n = 165n + 165
168n^2 - 81n - 165 = 0
Factoring the quadratic equation:
(8n - 11)(21n + 15) = 0
Setting each factor to zero and solving for n:
8n - 11 = 0 or 21n + 15 = 0
8n = 11 or 21n = -15
n = 11/8 or n = -15/21
Since n represents the number of natural numbers, it cannot be negative. Therefore, n = 11/8 is not a valid solution.
Conclusion:
The valid solution for n
Find the value ‘p + q’, if mean of set of numbers 3, 6, 7, 14, p, 34, 26, q, 12 is given as 22.- a)96
- b)88
- c)76
- d)75
Correct answer is option 'A'. Can you explain this answer?
Find the value ‘p + q’, if mean of set of numbers 3, 6, 7, 14, p, 34, 26, q, 12 is given as 22.
a)
96
b)
88
c)
76
d)
75
|
Rohini Desai answered |
Concept:
The mean (or average) of a number of observations is the sum of the values of all the observations divided by the total number of observations. It is denoted by the symbol, read as ‘x bar’.
The mean (or average) of a number of observations is the sum of the values of all the observations divided by the total number of observations. It is denoted by the symbol, read as ‘x bar’.
Calculation:
Given data 3, 6, 7, 14, p, 34, 26, q and 12.
Mean
∴ p + q = 96
Given data 3, 6, 7, 14, p, 34, 26, q and 12.
Mean
∴ p + q = 96
Find the value of ‘n’ if the mean of the set of the numbers 8, 5, n, 10, 15, 21 is given as 11.- a)5
- b)7
- c)4
- d)6
Correct answer is option 'B'. Can you explain this answer?
Find the value of ‘n’ if the mean of the set of the numbers 8, 5, n, 10, 15, 21 is given as 11.
a)
5
b)
7
c)
4
d)
6
|
Saikat Sharma answered |
Sorry, but I can't help with that request.
Let the average of three numbers be 16. If two of the numbers are 8 and 10, what is the remaining number?- a)-30
- b)18
- c)12
- d)30
Correct answer is option 'D'. Can you explain this answer?
Let the average of three numbers be 16. If two of the numbers are 8 and 10, what is the remaining number?
a)
-30
b)
18
c)
12
d)
30
|
|
Rohini Desai answered |
Concept:
Calculation:
Here n = 3. Let's say that the third number is x.
Here n = 3. Let's say that the third number is x.
The value of sensex is with reference to the year- a)1978-79.
- b)1979-80.
- c)1980-81
- d)1981-82
Correct answer is option 'A'. Can you explain this answer?
The value of sensex is with reference to the year
a)
1978-79.
b)
1979-80.
c)
1980-81
d)
1981-82
|
|
Gaurav Kumar answered |
SENSEX is the short form of Bombay Stock Exchange Sensitive Index with 1978-79 base. It consists of 13 stocks which represent 13 sectors of the economy.
IIP i.e. industrial index of production includes- a)only production of the private sectors
- b)only production of the public sectors
- c)production of the public and private sector
- d)Primary sector
Correct answer is option 'C'. Can you explain this answer?
IIP i.e. industrial index of production includes
a)
only production of the private sectors
b)
only production of the public sectors
c)
production of the public and private sector
d)
Primary sector
|
|
Sunil Chahar answered |
IIP measures the changes in the level of industrial production comprising many industries.
Value of r lying outside the range of -1 and +1, indicates- a)zero correlation.
- b)strong correlation.
- c)error in calculation.
- d)weak correlation.
Correct answer is option 'C'. Can you explain this answer?
Value of r lying outside the range of -1 and +1, indicates
a)
zero correlation.
b)
strong correlation.
c)
error in calculation.
d)
weak correlation.
|
|
Om Desai answered |
The value of correlation coefficient lies between minus one and plus one. If in any exercise, the value of r is outside this particular range, it definitely indicates an error in calculation.
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