This article was originally published on Built In by Eric Kleppen. Variance is a powerful statistic used in data analysis and machine learning. It is one of the four main measures of variability along ...

A stock's historical variance measures the difference between the stock's returns for different periods and its average return. A stock with a lower variance typically generates returns that are ...

Knowing an average is not enough to properly describe a data set. You also need a measure of how dispersed the data is. Values that are packed closely together display greater consistency than those ...