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Consecutive rectangles in a Histogram have no space in between
For the construction of grouped frequency distribution from ungrouped data we use
In Histogram if the classes of unequal width then the heights of the rectangles must be proportional to the frequency densities.
In representing simple frequency distributions of a discrete variable
Class boundaries should be considered to be the real limits for the class interval
“Cumulative Frequency” only refers to the
Most extreme values which would ever be included in a class interval are called
The number of types of cumulative frequency is
Frequency density is used in the construction of
Vertical bar chart may appear somewhat alike
In the construction of a frequency distribution, it is generally preferable to have classes of
For determining the class frequencies it is necessary that these classes are
Frequency density is used in the construction of
The number of observation falling within a class is called
For the construction of a grouped frequency distribution
In all Statistical and diagrams involving end points of classes
The number of “ Frequency distribution” is
The graphical representation of a cumulative frequency distribution is called
(Class frequency) / (width of the class) is defined as
An approximate idea of the shape of frequency curve is given by
In general the number of types of tabulation are
There are two types of tabulation methods :
a)simple tabulation
b)complex tabulation.
Unequal widths of classes in the frequency distribution do not cause any difficulty in the construction of
To find the number of observations less than any given value
The most common form of diagrammatic representation of a grouped frequency distribution is
The following data relate to the marks of 48 students in statistics:
What are the frequency densities for the class interval 3039, 4049 and 5059
The relationship between two variables are shown in
The following data relate to the incomes of 86 persons:
What is the percentage of persons earning more than Rs. 1500?
Cost of sugar in a month under the heads Raw Materials, labour, direct production and others were 12, 20, 35 and 23 units respectively. What is the difference between the central angles for the larges and smallest components of the cost of sugar?
In a study about the male and female students of commerce and science departments of a college in 5 years, the following dates were obtained:
After combining 1995 and 2000 if x denotes the ratio of female commerce students to female Science student and y denotes the ratio of male commerce student to male Science student, then
Out of 1000 persons, 25 per cent were industrial workers and the rest were agricultural workers. 300 persons enjoyed world cup matches on TV. 30 per cent of the people who had not watched world cup matches were industrial workers. What is the number of agricultural workers who had enjoyed world cup matches on TV?
A sample study of the people of an area revealed that total number of women were 40% and the percentage of coffee drinkers were 45 as a whole and the percentage of male coffee drinkers was 20. What was the percentage of female notcoffee drinkers?
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