Standard deviation measures how far numbers in a data set are spread out from an average value. In investing, it is used as a measurement of portfolio volatility.

When you have the average production of three machines, it is easy to calculate the average or mean production. You just add ...

For instance, tracking training and research as a part of the budget may use a formula similar to the budget variance metric: Watching out for scope creep can keep projects on budget and track to ...

Heritability is a measure of the proportion of phenotypic variance attributable to genetic variance, and it is an important predictor of the degree to which a population can respond to artificial ...