Statistical calculation

• Statistical measure of the variance of two random variables measured in the same mean time period

Wikipedia Word definitions in Wikipedia
In mathematics and physics , covariance is a measure of how much two variables change together, and may refer to:

Wiktionary Word definitions in Wiktionary
n. 1 (context statistics English) A statistical measure defined as scriptstyleoperatorname{Cov}(X, Y) = operatorname{E}((X - mu) (Y - nu)) given two real number-valued random variables ''X'' and ''Y'', with expected values scriptstyle E(X),=,mu and scriptstyle ...

WordNet Word definitions in WordNet
n. statistical measure of the variance of two random variables measured in the same mean time period

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
1878, from covariant (1853), from co- + variant .

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
covariance \covariance\ n. a statistical measure of the relationship of two variables, formed by multiplying the difference of each variable from its mean, both variables being measured at the same time, and averaging all such products.