Amit M Agarwal Solutions for Chapter: Statistics, Exercise 1: Work Book Exercise 20.1

The correct empirical relation between the measures of dispersion is

If $m$ is mean of distribution, then $\mathrm{\Sigma }\left(x_i-m\right)$ is equal to

The semi-interquartile range$=\lambda \sigma ,$ then $\lambda$ is

The root-mean-square deviation is least when deviations are measured from

In a symmetrical frequency distribution, lower and upper quartiles are equidistant from

$\mathrm{S}.\mathrm{D}.:\mathrm{M}.\mathrm{D}.:\mathrm{Q}.\mathrm{D}.$ is equal to

Which of following statement is true for a given distribution?

If $r$ is the range and $\sigma$ is the $\mathrm{S}.\mathrm{D}.$ of a set of $n$ observations, then correct relation is