“Spearman rank correlation coefficient”的概念、定义、翻译、参考文献-科学参考

单词	Spearman rank correlation coefficient
释义	Spearman rank correlation coefficient Statistics Alternative name for Spearman’s rho. Economics A distribution-free statistic measuring the degree of monotone association between two variables defined by $r = 1 - 6 \sum_{i = 1}^{N} d_{i}^{2} / (N (N^{2} - 1))$ where N is the number of pairs of observations and d is the difference in statistical ranks of the two variables in every pair.
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