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Huang2024-02-08 16:09:56
Huang同学你好，
单独只用协方差是不能比较线性关系强弱的。原版书的解释如下：
The size of the covariance measure alone is difficult to interpret as it involves squared units of measure and so depends on the magnitude of the variables. This brings us to the normalized version of covariance, which is the correlation coefficient.
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