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| Prova t de Welch (variances desiguals)× | Anàlisi de la variància d'un factor× | |
|---|---|---|
| Camp | Estadística | Estadística |
| Família | Hypothesis test | Hypothesis test |
| Any d'origen≠ | 1947 | 1925 |
| Autor original≠ | B. L. Welch | Ronald A. Fisher |
| Tipus≠ | Parametric mean comparison (unequal variances) | Parametric mean comparison |
| Font seminal≠ | Welch, B. L. (1947). The generalization of Student's problem when several different population variances are involved. Biometrika, 34(1/2), 28–35. DOI ↗ | Fisher, R. A. (1925). Statistical Methods for Research Workers. Edinburgh: Oliver and Boyd. link ↗ |
| Àlies≠ | unequal variances t-test, Welch-Satterthwaite t-test, Welch t-Testi (Eşit Olmayan Varyans) | one-factor ANOVA, single-factor ANOVA, analysis of variance, tek yönlü ANOVA |
| Relacionats | 4 | 4 |
| Resum≠ | Welch's t-test is a parametric hypothesis test that compares the means of two independent groups without assuming their variances are equal. It was introduced by B. L. Welch in 1947 as a more robust generalization of Student's two-sample test for situations where the two groups have different spread. | One-way ANOVA is a parametric hypothesis test that compares the means of three or more independent groups on a single continuous outcome to decide whether at least one group mean differs. It rests on the variance-partitioning framework introduced by Ronald A. Fisher in 1925. |
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