Question
What is coefficient of variation?
Solution
Coefficient of Variation : This concept is used to make comparison of dispersion or variation between two or more series. It is relative measure of variation. In the words of Karl Pearson, “Coefficient of variation is the percentage variation in the mean, the standard being treated as the total variation in the mean”. In fact, coefficient of variation is the percentage expression of standard deviation. Coefficient of
Where σ = standard deviation and 
Arithmetic mean.
