方法对比

	Kendall Tau 秩相关	Mann-Whitney U 检验
领域	统计学	统计学
方法族	Hypothesis test	Hypothesis test
起源年份	1938	1947
提出者	Maurice G. Kendall	H. B. Mann & D. R. Whitney
类型	Rank-based association measure	Nonparametric two-group comparison
开创性文献	Kendall, M. G. (1938). A new measure of rank correlation. Biometrika, 30(1–2), 81–93.	Mann, H. B. & Whitney, D. R. (1947). On a test of whether one of two random variables is stochastically larger than the other. Annals of Mathematical Statistics, 18(1), 50–60.
别名	Kendall's tau, Kendall tau-b, tau correlation, Kendall Tau Korelasyonu	Mann-Whitney-Wilcoxon test, Wilcoxon rank-sum test, Mann-Whitney U Testi
相关	4	4
摘要	Kendall Tau is a nonparametric rank correlation coefficient introduced by Maurice G. Kendall in 1938 to measure the strength and direction of a monotone association between two ordinal or continuous variables. It is particularly suited to small samples and datasets containing many tied ranks, where the Spearman coefficient can be less stable.	The Mann-Whitney U test is the nonparametric alternative to the independent samples t-test, comparing two independent groups by ranking all observations together rather than relying on their means. It was introduced by H. B. Mann and D. R. Whitney in 1947 and does not require the data to be normally distributed.