Find the coefficient of skewness = (Mean – Mode)/S.D.:

Calculate Pearson’s measure of skewness on the basis of Mean, Mode and Standard deviation–

 

Calculate from the undernoted table the measure of skewness based on Mean, Median and Standard Deviation:

Marks 55-58 Frequency 12 58-61 17 61-64 23 64-67 18 67-70 11