Compară metode
Examinează metodele selectate una lângă alta; rândurile care diferă sunt evidențiate.
| Testul Levene și Brown-Forsythe pentru egalitatea varianțelor× | Testul U Mann-Whitney× | |
|---|---|---|
| Domeniu | Statistică | Statistică |
| Familie≠ | Regression model | Hypothesis test |
| Anul apariției≠ | 1960 | 1947 |
| Autorul original≠ | Howard Levene; Morton B. Brown and Alan B. Forsythe | H. B. Mann & D. R. Whitney |
| Tip≠ | Homogeneity of variance test (robust) | Nonparametric two-group comparison |
| Sursa seminală≠ | Levene, H. (1960). Robust Tests for Equality of Variances. In Contributions to Probability and Statistics: Essays in Honor of Harold Hotelling. Stanford University Press. link ↗ | 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. DOI ↗ |
| Denumiri alternative≠ | Levene test, Brown-Forsythe test, homogeneity of variance test, Levene ve Brown-Forsythe Varyans Testi | Mann-Whitney-Wilcoxon test, Wilcoxon rank-sum test, Mann-Whitney U Testi |
| Înrudite≠ | 5 | 4 |
| Rezumat≠ | The Levene and Brown-Forsythe test checks whether two or more groups share the same variance (homogeneity of variance). Levene (1960) built the test on absolute deviations from each group mean, and Brown and Forsythe (1974) made it robust to non-normal data by centring on the group median instead. | 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. |
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