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	Analisis Varians Welch	Ujian-t Welch (varian tidak sama)
Bidang	Statistik	Statistik
Keluarga	Hypothesis test	Hypothesis test
Tahun asal	1951	1947
Pengasas	B. L. Welch	B. L. Welch
Jenis	Parametric mean comparison (heteroscedastic)	Parametric mean comparison (unequal variances)
Sumber perintis	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.
Alias	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)
Berkaitan	3	4
Ringkasan	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.