“population covariance”的概念、定义、翻译、参考文献-科学参考

单词	population covariance
释义	population covariance [´päp·yǝ`lā·shǝn kō`ver·ē·ǝns] ^STATISTICS The number (1/N )[(v₁ - v̄ )(w₁ - w ) + ... + (v_N - v̄ )(w_N - w )], where v_i and w_i , i = 1, 2, ..., N, are the values obtained from two populations, and v̄ and w are the respective means.
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