Question

If the mean, standard
deviation and coefficient of
skewness of a frequency
distribution are 60, 45 and
-0.4, respectively, the mode
of the frequency distribution
is: *

​

Answer 1

Answer:

Coefficient Sk=3(X¯ Median)σ  

X¯=45, Med=48

Coefficient of Sk=−0.4

⇒−0.4=3(45−48)σ=0.4σ⇒=−9

⇒σ=2.25

Explanation: