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Pearson's correlation coefficient

British

noun

In full: Pearson's product moment correlation coefficient. a statistic measuring the linear relationship between two variables in a sample and used as an estimate of the correlation in the whole population, given by r = Cov ( X, Y ) /√ [( Var ( X ) .Var ( 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

Etymology

Origin of Pearson's correlation coefficient

named after Karl Pearson (1857–1936), British mathematician

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Pearson's correlation coefficient

According to Kim, people often think first of Pearson's correlation coefficient when they hear the word agreement, since it is introduced early in statistics education and remains a fundamental tool.

From Science Daily ● Nov. 14, 2025

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