Compara mètodes

	Test U de Mann-Whitney	Test t per a mostres independents
Camp	Estadística	Estadística
Família	Hypothesis test	Hypothesis test
Any d'origen	1947	1908
Autor original	H. B. Mann & D. R. Whitney	Student (W. S. Gosset)
Tipus	Nonparametric two-group comparison	Parametric mean comparison
Font seminal	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.	Student (1908). The probable error of a mean. Biometrika, 6(1), 1–25.
Àlies	Mann-Whitney-Wilcoxon test, Wilcoxon rank-sum test, Mann-Whitney U Testi	student t-test, two-sample t-test, unpaired t-test, bağımsız örneklem t-testi
Relacionats	4	4
Resum	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.	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.