विधियों की तुलना करें

	ट्रिम्ड मीन टेस्ट (युएन का टेस्ट)	वेल्च की टी-परीक्षा (असमान प्रसरण)
क्षेत्र	सांख्यिकी	सांख्यिकी
परिवार	Regression model	Hypothesis test
उद्भव वर्ष	1974	1947
प्रवर्तक	Karen K. Yuen	B. L. Welch
प्रकार	Robust two-group comparison	Parametric mean comparison (unequal variances)
मौलिक स्रोत	Yuen, K. K. (1974). The Two-Sample Trimmed t for Unequal Population Variances. Biometrika, 61(1), 165-170.	Welch, B. L. (1947). The generalization of Student's problem when several different population variances are involved. Biometrika, 34(1/2), 28–35.
उपनाम	Yuen's test, Yuen-Welch test, robust mean comparison, kırpılmış ortalama testi	unequal variances t-test, Welch-Satterthwaite t-test, Welch t-Testi (Eşit Olmayan Varyans)
संबंधित	4	4
सारांश	The trimmed mean test compares two groups using trimmed means, which discard a fixed proportion of the most extreme observations in each tail before averaging. Introduced by Karen K. Yuen in 1974, it is a robust alternative to the classical t-test when the data are non-normal or contain outliers and the population variances are unequal.	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.