手法を比較

	ケンドールの順位相関係数 (Kendall's Tau Rank Correlation)	スペルマン順位相関係数
分野	統計学	統計学
系統	Hypothesis test	Hypothesis test
提唱年	1938	1904
提唱者	Maurice G. Kendall	Charles Spearman
種類	Nonparametric rank correlation	Nonparametric rank-based correlation
原典	Kendall, M. G. (1938). A new measure of rank correlation. Biometrika, 30(1/2), 81–93.	Spearman, C. (1904). The proof and measurement of association between two things. The American Journal of Psychology, 15, 72–101.
別名	Kendall tau, Kendall rank correlation, tau-b, tau-c	Spearman's rho, Spearman rank-order correlation, Spearman Sıra Korelasyonu
関連	4	4
概要	Kendall's tau is a nonparametric measure of the ordinal association between two variables. It quantifies how consistently the relative ordering of one variable matches the ordering of another across all observation pairs, making it robust to outliers and suitable for ordinal or non-normally distributed data.	The Spearman rank correlation coefficient (ρ) is a nonparametric measure of the monotonic association between two variables. Introduced by Charles Spearman in 1904, it converts raw observations to ranks and measures how consistently one variable increases as the other increases, without assuming a normal distribution or a linear relationship.