השוואת שיטות

	מבחן t חד-מדגמי רובסטי (ממוצע חתוך)	מבחן הסימן
תחום	סטטיסטיקה	סטטיסטיקה
משפחה	Hypothesis test	Hypothesis test
שנת המקור	1970s–2000s	1946
הוגה השיטה	Rand R. Wilcox (extending Yuen's trimmed-mean approach)	W. J. Dixon & A. M. Mood
סוג	Robust parametric mean comparison	Nonparametric median test
מקור מכונן	Wilcox, R. R. (2012). Introduction to Robust Estimation and Hypothesis Testing (3rd ed.). Academic Press. ISBN: 978-0123869838	Dixon, W. J. & Mood, A. M. (1946). The statistical sign test. Journal of the American Statistical Association, 41(236), 557–566.
כינויים	one-sample trimmed mean test, Yuen one-sample test, robust one-sample location test, trimmed mean t-test	İşaret Testi (Sign Test), one-sample sign test, paired sign test
קשורות	4	4
תקציר	The robust one-sample t-test replaces the ordinary mean with a trimmed mean and the sample variance with a Winsorized variance to compare a population location against a hypothesized value. It retains the t-test decision framework while sharply reducing sensitivity to outliers and heavy-tailed distributions, making it reliable in real-world continuous data that deviate from normality.	The sign test is the simplest nonparametric hypothesis test for deciding whether the median of paired differences — or of a single sample — differs significantly from a hypothesised value. Formalised by W. J. Dixon and A. M. Mood in 1946, it imposes virtually no distributional assumptions and can be applied to any data where individual differences can be classified as positive or negative.