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

3 May 2025

DESIRABLE

(adjective) worth having or seeking or achieving; “a desirable job”; “computer with many desirable features”; “a desirable outcome”


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Coffee Trivia

There are more than 50 countries that export coffee. They are near the equator, where the climate is conducive to producing coffee beans.

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