An indication in a way that variance of y-variable is explained by x-variable which is shown as

An indication in a way that variance of y-variable is explained by x-variable which is shown as degree of dispersion is one. The measure of dispersion helps us to study the variability of the items. In a statistical sense, dispersion has two meanings: first it measures the variation of the items among themselves, and second, it measures the variation around the average.