+91-8076753736 [email protected]

-->

Measures Of Dispersion

Question

Wired Faculty App

Differentiate between Mean Deviation and Standard Deviation.

Solution

Difference between Mean Deviation and Standard Deviation:

Mean Deviation	Standard Deviation
1. In calculating mean deviation. algebraic signs are ignored.	1. In calculating standard deviation, algebraic signs are taken into account.
2. Mean or median is used in calculating the mean deviation.	2. Only mean is used in calculating the standard deviation.

Some More Questions From Measures of Dispersion Chapter

If in the previous question, each worker is given a hike of 10% in wages, how are the mean and standard deviation values affected?

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.

Mock Test Series

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation