Question

The sum of squares of deviations for 10 observations taken from mean 50 is 250. The co-efficient of variation is

• A. 0.5
• B. 0.1
• C. 0.4
• D. none of these.

Answer 1

Answer: (B)

0.1

Answer 2

$S.D.\left(\sigma\right)=\sqrt{\frac{250}{10}}=\sqrt{25}=5$ Hence, coefficient of variation $=\frac{\sigma}{mean}\times100$ $=\frac{5}{50}\times100=10\%.$