Q. If the coefficient of variation is 45% and the mean is 12 then its standard derivation is
A) 5.2
B) 5.3
C) 5.4
D) None of these
Explanation
(c)
Since, percentage of coefficient of variation
$= \frac{Standerd\ deviation}{Mean} \times 100$
$\therefore 45 = \frac{\sigma}{12} \times 100$
$\Rightarrow \sigma = \frac{45 \times 12}{100} = 5.4$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.