השוואת שיטות

	מבחן ממוצע חתוך (מבחן יואן)	אומדן סטיית תקן מוחלטת חציונית (MAD)
תחום	סטטיסטיקה	סטטיסטיקה
משפחה	Regression model	Regression model
שנת המקור	1974	1974
הוגה השיטה	Karen K. Yuen	Hampel (influence-curve treatment); classical robust statistics
סוג	Robust two-group comparison	Robust scale estimator
מקור מכונן	Yuen, K. K. (1974). The Two-Sample Trimmed t for Unequal Population Variances. Biometrika, 61(1), 165-170.	Hampel, F. R. (1974). The Influence Curve and Its Role in Robust Estimation. Journal of the American Statistical Association, 69(346), 383-393.
כינויים	Yuen's test, Yuen-Welch test, robust mean comparison, kırpılmış ortalama testi	median absolute deviation, MAD scale estimator, robust scale estimation, Medyan Mutlak Sapma (MAD) Tahmini
קשורות	4	5
תקציר	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.	Median Absolute Deviation estimation is a robust measure of statistical dispersion that replaces the standard deviation when outliers are present. Rooted in the influence-curve framework formalised by Hampel (1974), it summarises the spread of a continuous variable using medians instead of means, so a single extreme value cannot distort the result.