Standard deviation is the positive square root of variance,$\sigma=\sqrt{25}=5$. The coefficient of variation is $100\sigma/\mu=100(5)/16=\mathbf{31.25\%}$. Using variance directly would confuse squared units with the units of the mean.
More Probability and Statistics questions
GATE 2024 AG Q26– Threshers P, Q, R pass an endurance test with probabilities1/6,1/4,1/2. Find probability…
GATE 2023 AG Q49– Convective storms occur with probability.7 and magnitude density f 1(x)=e-x for x>0.…
GATE 2022 AG Q12– Find the probability of 53 Sundays in a randomly selected leap year.
GATE 2021 AG Q23– P(A)=.35,P(B)=.25,and A, B are mutually exclusive. Find P(A A∪B),to three decimals.
GATE 2021 AG Q49– A 9-person committee has 4 B.Tech,3 M.Tech,2 PhD students. Remove3 uniformly at random.…
GATE 2026 AG Q12– A box contains one red and two blue balls. After each random draw, the ball is returned.…