协方差(covariance)与方差(variance)的对比

协方差(covariance)与方差(variance)的对比 标准差( standard deviation):web x=∑i=0n(X−X¯¯¯¯)2n−1−−−−−−−−−√ x = ∑ i = 0 n ( X − X ¯ ) 2 n − 1 方差(variance):svg x=∑i=0n(X−X¯¯¯¯)2n−1 x = ∑ i = 0 n ( X − X ¯ ) 2 n − 1 协方
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