Question

Compute the coefficient of skewness based on Pearson's method.

Answer 1

In the above frequency distribution, the frequencies are asymmetrical. So, to find skewness use:

K.P.C.S = 3(x-m/σ)

Here x̄ = (∑fx/N)

Median after finding less than cumulative frequency (L.C.F) 

M = (N+1/2)^th item; and

Karl Pearson's coefficient of skewness:

Note: Same type of problems can also be solved for continuous data.