השוואת שיטות

	מתאם נקודה-דו-סדרתי	מבחן t למדגמים בלתי תלויים
תחום	סטטיסטיקה	סטטיסטיקה
משפחה	Hypothesis test	Hypothesis test
שנת המקור	1954	1908
הוגה השיטה	Robert F. Tate	Student (W. S. Gosset)
סוג	Parametric correlation coefficient	Parametric mean comparison
מקור מכונן	Tate, R. F. (1954). Correlation between a discrete and a continuous variable. Point-biserial correlation. Annals of Mathematical Statistics, 25(3), 603–607.	Student (1908). The probable error of a mean. Biometrika, 6(1), 1–25.
כינויים	rpb, r_pb, point biserial r, item-total correlation	student t-test, two-sample t-test, unpaired t-test, bağımsız örneklem t-testi
קשורות	4	4
תקציר	The point-biserial correlation coefficient (r_pb) measures the strength and direction of the linear association between one naturally dichotomous variable (coded 0/1) and one continuous variable. It is a special case of the Pearson product-moment correlation formally derived by Tate (1954) in the Annals of Mathematical Statistics and is the standard index used in psychometric item analysis, validity studies, and any research context where a binary grouping variable is related to a continuous outcome.	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.