| 单词 | covariance |
| 释义 | covariance[ koh-vair-ee-uhns ] / koʊˈvɛər i əns / noun Statistics.the expectation or mean value of the variable formed by multiplying the differences obtained by subtracting two given variates from their respective means; the product of the standard deviations of two given variates and the coefficient of correlation between them. Origin of covarianceFirst recorded in 1875–80; co- + variance Words nearby covarianceCOV, covalence, covalency, covalent, covalent bond, covariance, covariant, covariant theory, covariate, Covarrubias, cove Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 British Dictionary definitions for covariancecovariance / (kəʊˈvɛərɪəns) / nounstatistics a measure of the association between two random variables, equal to the expected value of the product of the deviations from the mean of the two variables, and estimated by the sum of products of deviations from the sample mean for associated values of the two variables, divided by the number of sample points. Written as Cov (X, Y) Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 |
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