The coefficient of variation is independent of units.

The marks obtained by students $A$ and $B$ in $3$ examinations are given below

The ratio of the coefficient of variation of marks of $A$ and the coefficient of variation of marks of $B$ is

Find the Coefficient of mean deviation from median of observations

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

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 $40,62,54,90,68,76$.

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

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 $100\}$

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