Krahasoni metodat

	Analiza e Variancës sipas Welch	Testi t i Welch-it (varianca të pabarabarta)
Fusha	Statistikë	Statistikë
Familja	Hypothesis test	Hypothesis test
Viti i origjinës	1951	1947
Krijuesi	B. L. Welch	B. L. Welch
Lloji	Parametric mean comparison (heteroscedastic)	Parametric mean comparison (unequal variances)
Burimi themelues	Welch, B.L. (1951). On the Comparison of Several Mean Values. Biometrika, 38(3/4), 330–336.	Welch, B. L. (1947). The generalization of Student's problem when several different population variances are involved. Biometrika, 34(1/2), 28–35.
Emërtime të tjera	Welch's F-test, heteroscedastic one-way ANOVA, Welch ANOVA — Heterojen Varyans ANOVA	unequal variances t-test, Welch-Satterthwaite t-test, Welch t-Testi (Eşit Olmayan Varyans)
Të lidhura	3	4
Përmbledhja	Welch ANOVA is a parametric hypothesis test that compares the means of three or more independent groups when their variances are not equal. Introduced by B. L. Welch in 1951, it replaces classic one-way ANOVA whenever the homogeneity-of-variance assumption fails, while still requiring approximately normal data.	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.