Question

If the standard deviation of a set of scores is $1.2$ and their mean is $10$, then the coefficient of variation of the scores is

• A. $12$
• B. $0.12$
• C. $20$
• D. $120$

Answer 1

Answer: (A)

$12$

Given : standard deviation$\left(\sigma \right)=1.2,$ mean$\left(\overline{X}\right)=10$.

Coefficient of variation(C.V.) $=\frac{\sigma }{\overline{X}}\times 100=\frac{1.2}{10}\times 100=12$

$\therefore$ C.V. $=12$

Hence, option $A$ is correct.