单词 | product moment |
释义 | product momentStatistics noun (With reference to a set of pairs of statistical data) the sum of the products of the elements of each pair; frequently attributive (usually with hyphen), designating a correlation coefficient (symbol r) calculated from this, equal to the covariance divided by the geometric mean of the variances. OriginLate 19th century; earliest use found in The Economic Journal. |
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