Compara mètodes

	Coeficient de correlació de rangs de Spearman	Correlació de rangs Tau de Kendall
Camp	Estadística	Estadística
Família	Hypothesis test	Hypothesis test
Any d'origen	1904	1938
Autor original	Charles Spearman	Maurice G. Kendall
Tipus	Nonparametric rank-based correlation	Rank-based association measure
Font seminal	Spearman, C. (1904). The proof and measurement of association between two things. The American Journal of Psychology, 15, 72–101.	Kendall, M. G. (1938). A new measure of rank correlation. Biometrika, 30(1–2), 81–93.
Àlies	Spearman's rho, Spearman rank-order correlation, Spearman Sıra Korelasyonu	Kendall's tau, Kendall tau-b, tau correlation, Kendall Tau Korelasyonu
Relacionats	4	4
Resum	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.	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.