Question

In a series of observations, S.D.$=7$ and mean is $28$, the coefficient of variation is

• A. $4$
• B. $1/4$
• C. $25$
• D. $12.5$

Answer 1

The correct option is C $25$

The coefficient of variation ($C_v$) is defined as the ratio of the standard deviation $\sigma$ to the mean $\mu$
$C_v=\frac{\sigma }{\mu }\times 100$
$C_v=\frac{7}{28}\times 100$
$C_v=\frac{1}{4}\times 100$
$C_v=25$