Krahasoni metodat

	Testi t i Welch-it (varianca të pabarabarta)	Test t për mostra të pavarura
Fusha	Statistikë	Statistikë
Familja	Hypothesis test	Hypothesis test
Viti i origjinës	1947	1908
Krijuesi	B. L. Welch	Student (W. S. Gosset)
Lloji	Parametric mean comparison (unequal variances)	Parametric mean comparison
Burimi themelues	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.
Emërtime të tjera	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
Të lidhura	4	4
Përmbledhja	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.