Comparer des méthodes

	Test t pour échantillons indépendants	Test U de Mann-Whitney
Domaine	Statistique	Statistique
Famille	Hypothesis test	Hypothesis test
Année d'origine	1908	1947
Auteur d'origine	Student (W. S. Gosset)	H. B. Mann & D. R. Whitney
Type	Parametric mean comparison	Nonparametric two-group comparison
Source fondatrice	Student (1908). The probable error of a mean. Biometrika, 6(1), 1–25.	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.
Alias	student t-test, two-sample t-test, unpaired t-test, bağımsız örneklem t-testi	Mann-Whitney-Wilcoxon test, Wilcoxon rank-sum test, Mann-Whitney U Testi
Apparentées	4	4
Résumé	The independent samples t-test is a parametric hypothesis test that compares the means of two independent groups to decide whether they differ significantly. It builds on the t-distribution introduced by Student (W. S. Gosset) in 1908 and assumes the measured values are continuous, approximately normally distributed, and have equal variances.	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.