Question

Calculate Karl – Pearson’s coefficient of skewness from the following data.

Year	0-10	10-20	20-30	30-40	40-50	50-60	60-70	70-80
No. of persons	10	40	20	0	10	40	16	14

Answer 1

The frequency distribution is bi-modal, so using Karl-Pearson’s coefficient of skewness for ill-defined data:

= 3(X -m)/σ 

Let C.I and f be the Age and no.of persons

The distribution is negatively skewed.