Question

If mean of a series is 40 and variance 1486, then coefficient of variation is

• A. $0.9021$
• B. $0.9637$
• C. $0.8864$
• D. $0.9853$

Answer 1

Answer: (B)

$0.9637$

If mean of the given dist. be $\overline{x}$ and S.D be $\sigma$
then given $\overline{x}=40,{\sigma }^2=1486$
$\therefore$ Coefficient of variation $=\frac{\sigma }{\overline{x}}=\frac{\sqrt{1486}}{40}=.9637$