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Absolute: Measures of variation may be either absolute or relative. Absolute measures of variation are expressed in the same statistical unit in which the original data are given such as rupees, kilograms, tones, etc. These values may be used to compare the variation in two or more than two distributions provided the variables are expressed in the same units, such as quintals of sugar versus tones of sugarcane, if the average value is very much different, such as manager salary versus workers salary, the absolute measures of variation are not comparable.

Relative: A measure of relative variation is the ratio of a measure of absolute variation to an average. It is sometimes called a coefficient of variation, because “coefficient” means a pure number that is independent of the unit of measurement. It should be the same one from which the absolute deviations were measured.