Define the Absolute Measure of Dispersion.

Find the Coefficient of mean deviation from median of observations

$40,62,51,25,72,80$

What are the requisites of a good measure of variation?

The following statement is the demerit of coefficient of variation. 

The coefficient of variation cannot be used to find the intervals of the mean.

Calculate coefficient of mean deviation about mean for the following data:

$7,4,10,9,15,12,7,9,9,18$

Find the Coefficient of mean deviation from median of observations

$50,62,78,42,38,26$

Calculate the mean deviation about mean from the following data, relating to height (to the nearest cm) of $100$ children.

Represent the union of two sets by Venn diagram for each of the following.

$X=\{x | x$ is a prime number between $80$ and $100\}$

$Y=\{y | y$ is an odd number between $90$ and $100\}$

Distinguish between absolute and relative measures of variation. Give a broad classification of the measures of variations.

Find the Coefficient of mean deviation from median of observations $40,62,54,90,68,76$.