B1 Dispersion and skewness

S.No	Dispersion	Skewness
1	It is concerned with measuring the amount of variation in a series rather than with its direction	It is concerned with the variation or the departure from symmetry
2	It tells us about composition of the series	It tells about the shape of the series
3	Measures of dispersion are based on averages of the first order such as K, M, Z etc	Measure of skewness arc based on averages of the first and second order such as X, M, Z etc

What is the difference between Dispersion and Skewness?

Dispersion concerns about the range over which the data points are distributed, and the skewness concerns the symmetry of the distribution.

Both measures of dispersion and skewness are descriptive measures and coefficient of skewness gives an indication to the shape of the distribution.

Measures of dispersion are used to understand the range of the data points and offset from the mean while skewness is used for understanding the tendency for the variation of data points into a certain direction.