COVARIANCE

covariance

(noun) (statistics) the mean value of the product of the deviations of two variates from their respective means

Source: WordNet® 3.1


Etymology

Noun

covariance (plural covariances)

(statistics) A statistical measure defined as \(\scriptstyle\operatorname{Cov}(X, Y) = \operatorname{E}((X - \mu) (Y - \nu))\) given two real-valued random variables X and Y, with expected values \(\scriptstyle E(X)\,=\,\mu\) and \(\scriptstyle E(Y)\,=\,\nu\).

(object-oriented programming) The conversion of data types from wider to narrower in certain situations.

Coordinate term: contravariance

Source: Wiktionary



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Word of the Day

26 February 2025

ACRIMONIOUS

(adjective) marked by strong resentment or cynicism; ā€œan acrimonious disputeā€; ā€œbitter about the divorceā€


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Coffee Trivia

The average annual yield from one coffee tree is the equivalent of 1 to 1 1/2 pounds of roasted coffee. It takes about 4,000 hand-picked green coffee beans to make a pound of coffee.

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