قارن الطرق

	اختبار ت للعينات المستقلة	اختبار ت ของ ولش (تباينات غير متساوية)
المجال	الإحصاء	الإحصاء
العائلة	Hypothesis test	Hypothesis test
سنة النشأة	1908	1947
صاحب الطريقة	Student (W. S. Gosset)	B. L. Welch
النوع	Parametric mean comparison	Parametric mean comparison (unequal variances)
المصدر التأسيسي	Student (1908). The probable error of a mean. Biometrika, 6(1), 1–25.	Welch, B. L. (1947). The generalization of Student's problem when several different population variances are involved. Biometrika, 34(1/2), 28–35.
الأسماء البديلة	student t-test, two-sample t-test, unpaired t-test, bağımsız örneklem t-testi	unequal variances t-test, Welch-Satterthwaite t-test, Welch t-Testi (Eşit Olmayan Varyans)
ذات صلة	4	4
الملخص	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.	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.