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	t-test po Velču (nejednake varijanse)	Nezavisni t-test za uzorke
Oblast	Statistika	Statistika
Porodica	Hypothesis test	Hypothesis test
Godina nastanka	1947	1908
Tvorac	B. L. Welch	Student (W. S. Gosset)
Tip	Parametric mean comparison (unequal variances)	Parametric mean comparison
Temeljni izvor	Welch, B. L. (1947). The generalization of Student's problem when several different population variances are involved. Biometrika, 34(1/2), 28–35.	Student (1908). The probable error of a mean. Biometrika, 6(1), 1–25.
Drugi nazivi	unequal variances t-test, Welch-Satterthwaite t-test, Welch t-Testi (Eşit Olmayan Varyans)	student t-test, two-sample t-test, unpaired t-test, bağımsız örneklem t-testi
Srodne	4	4
Sažetak	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.	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.