Mechanical Engineering Exam  >  Mechanical Engineering Notes  >  General Aptitude for GATE  >  Chapter Notes - Organisation of Data

Organisation of Data Class 11 Economics

Classification of Data


Classification is the technique of categorizing data into groups that share common characteristics or features. It involves sorting data into homogeneous classes or groups based on their similarities.
Organisation of Data Class 11 Economics

Data in its raw form is often difficult to comprehend and unsuitable for analysis and interpretation. The organization of data into categories aids in its comparison and analysis. For instance, the population of a town can be categorized based on factors like gender, age, marital status, and so on.

Objectives of Data Classification

  • Simplification and Briefness
  • Utility
  • Distinctiveness
  • Comparability
  • Scientific arrangement
  • Attractive and effective

Organisation of Data Class 11 Economics

Characteristics of a Good Classification

  • Comprehensiveness
  • Clarity
  • Homogeneity
  • Suitability
  • Stability
  • Elastic

Question for Chapter Notes - Organisation of Data
Try yourself:What is the process of arranging data into homogeneous groups based on their common features?
View Solution

Raw Data


Raw data is unstructured and requires processing and organisation before it can be used effectively to derive meaningful insights.

Chronological Classification


Chronological classification is a method of categorising data based on time, where the data is arranged either in ascending or descending order with respect to a particular time frame such as years, quarters, months, or weeks. This type of classification is also referred to as "temporal classification".

Question for Chapter Notes - Organisation of Data
Try yourself:What is the purpose of a chronological classification?
View Solution

Geographical Classification


Geographical Classification refers to the classification of data based on geographical locations such as countries, states, cities, districts, etc. It is also known as Spatial Classification.

Qualitative Classification


Qualitative Classification is a type of data classification that provides descriptive information about the quality of something or someone. For example, skin colour, eye colour, hair texture, etc. can give us qualitative information about a person.

Organisation of Data Class 11 Economics

Condition Series


Condition Series involves the classification of data according to changes occurring in variables under specific conditions. Variables such as height, weight, age, marks, income, etc. can be used for condition series.

Attributes


Attributes refer to additional information about the characteristics of each spatial data in the survey. For instance, in a population survey, attributes of the individuals may include their name, age, height, weight, etc.

Variable


Variable refers to a characteristic that varies or changes from one investigation to another, such as person to person, time to time, or place to place. It can be a quantity or attribute that has different values.

Question for Chapter Notes - Organisation of Data
Try yourself:What does the term "variable" mean in statistical analysis?
View Solution

Class Limits


Continuous variables refer to variables that can take any possible value (including fractions) within a specified range. Examples of continuous variables include temperature, height, weight, and marks.

Class Interval or Class Width


Discrete variables, on the other hand, are variables that can only take exact values and not fractional values. For example, the number of workers or students in a class is a discrete variable, as is the number of children in a family.

Organisation of Data Class 11 Economics

Class Mid Point or Class Mark


A frequency distribution table is a comprehensive way of representing the organization of raw data of a quantitative variable. This table shows how various values of a variable are distributed and their corresponding frequencies. Frequency distributions can be classified as discrete or continuous.

  • Class limits are the numerical figures that specify the lower and upper limits of a class interval.
  • A class interval (or class width) is an interval used to group variable values. For example, a group of people can be classified according to age group, with class intervals such as 15-19 years, 20-24 years, 25-29 years, and so on.

Class Mid Point or Class Mark


The class midpoint (or class mark) is the number in the middle of a class interval, found by adding the upper and lower limits and dividing them by two.

Frequency Curve


A frequency curve is obtained by joining the points of a frequency polygon through a freehand smoothed curve rather than straight lines.

Tally Marking


Tally marking is a method of keeping count using a unary numeral system. The general way of writing tally marks is as a group or set of five lines, where the first four lines are drawn vertically and the fifth line runs diagonally over the previous four vertical lines. Tally marks were used in earlier times when keeping track of individual belongings, such as domestic animals like goats and cows, was challenging.

Question for Chapter Notes - Organisation of Data
Try yourself:What is the purpose of tally marks?
View Solution

Frequency Array 


A frequency array is a way of organizing data for a discrete variable, showing the different values of the variable along with their respective frequencies.

Bivariate Frequency Distribution 


When the frequency distribution involves two variables, it is called a bivariate frequency distribution. This type of distribution shows the frequencies of two variables together, such as the income and expenditure data of households.

Organisation of Data Class 11 Economics

Question for Chapter Notes - Organisation of Data
Try yourself:What is a bivariate frequency distribution?
View Solution

Univariate Frequency Distribution 


A statistical data series that shows the frequency of only one variable is referred to as univariate frequency distribution. This type of frequency distribution displays the frequency distribution of a single variable, such as the income of people or marks scored by students.

Multivariate Distribution 


Multivariate distributions represent the correlation between at least two estimates and the relationships among them. For each univariate distribution with one random variable, there is a broader multivariate distribution. For example, the univariate normal distribution has a broader counterpart, the multivariate normal distribution, which is the most commonly used model for examining multivariate data. However, there are other types of multivariate distributions as well, including the multivariate lognormal distribution, the multivariate binomial distribution, etc.

Organisation of Data Class 11 Economics

The document Organisation of Data Class 11 Economics is a part of the Mechanical Engineering Course General Aptitude for GATE.
All you need of Mechanical Engineering at this link: Mechanical Engineering
198 videos|165 docs|152 tests

Top Courses for Mechanical Engineering

FAQs on Organisation of Data Class 11 Economics

1. What is raw data and how is it different from organized data?
Ans.Raw data refers to unprocessed information collected directly from various sources, such as surveys or experiments, that has not yet been analyzed or summarized. Organized data, on the other hand, has been processed and categorized for easier analysis and interpretation, allowing for clearer insights to be drawn.
2. What are the different types of data classifications?
Ans.Data can be classified into several types: chronological classification organizes data based on time; geographical classification organizes data based on location; qualitative classification categorizes data based on attributes or qualities; condition series refers to data categorized based on specific conditions or situations.
3. What are class limits and how do they relate to class intervals?
Ans.Class limits are the smallest and largest values that define a class in a frequency distribution. Class intervals, or class width, refer to the range of values within each class. For example, if a class limit is 10-20, the class interval is 10, representing the range of data values that fall within that limit.
4. What is the significance of attributes in data classification?
Ans.Attributes are specific characteristics or qualities of the data being analyzed. In data classification, attributes help categorize and differentiate data points, allowing for a more nuanced understanding of the dataset and enabling more effective analysis and insights.
5. How does chronological classification aid in data analysis?
Ans.Chronological classification helps in organizing data in a time-sequenced manner, which allows analysts to identify trends, patterns, and changes over time. This type of classification is particularly useful in fields such as finance, economics, and social sciences, where timing can significantly impact analysis and decision-making.
198 videos|165 docs|152 tests
Download as PDF
Explore Courses for Mechanical Engineering exam

Top Courses for Mechanical Engineering

Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
10M+ students study on EduRev
Related Searches

shortcuts and tricks

,

Free

,

Summary

,

Organisation of Data Class 11 Economics

,

mock tests for examination

,

Previous Year Questions with Solutions

,

Semester Notes

,

Sample Paper

,

Viva Questions

,

Important questions

,

practice quizzes

,

past year papers

,

study material

,

Organisation of Data Class 11 Economics

,

Objective type Questions

,

MCQs

,

Organisation of Data Class 11 Economics

,

ppt

,

Exam

,

pdf

,

Extra Questions

,

video lectures

;