Statistics And Probability Question 417
Question: The sum of squares of deviations for 10 observations taken from mean 50 is 250. The co-efficient of variation is
[DCE 1996]
Options:
A) 50%
B) 10%
C) 40%
D) None of these
Show Answer
Answer:
Correct Answer: B
Solution:
$ S\text{.D}\text{.} $ $ (\sigma )=\sqrt{\frac{250}{10}}=\sqrt{25}=5 $ Hence, coefficient of variation $ =\frac{\sigma }{mean}\times 100 $ $ =\frac{5}{50}\times 100=10 $ %.
BETA
