 InvestHub.com's Finance Dictionary and Glossary of Investment Terms variance Definition 1.
Definition 1  Definition 2.
A measure of dispersion of a set of data points around their mean value. The mathematical expectation of the average squared deviations from the mean. The square root of the variance is the standard deviation.  Definition 3.
A measure of the dispersion of a set of data points around their mean value. It is mathematical expectation of the average squared deviations from the mean. 

