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Measures Of Dispersion

Question

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How is coefficient of quartile deviation calculated?

Solution

Coefficient of quartile deviation is calculated by using the following formula:

Coefficient of QD

Some More Questions From Measures of Dispersion Chapter

The sum of 10 values is 100 and the sum of their squares is 1090. Find the coefficient of variation.

Calculate the mean deviation about mean and standard deviation for the following distribution:

Classes

Frequencies

20–40

3

40–80

6

80–100

20

100–120

12

120–140

9

50

A measure of dispersion is a good .supplement to the central value in understanding a frequency distribution. Comment

Define dispersion.

How many methods are there to calculate dipersion?

Define range.

Define quartile deviation.

How is coefficient of quartile deviation calculated?

Define mean deviation.

Define standard deviation.

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