পদ্ধতির তুলনা করুন

	পয়েন্ট-বাইসিরিয়াল কোরিলেশন	স্পিয়ারম্যান র‍্যাঙ্ক কোরিলেশন কোএফিসিয়েন্ট
ক্ষেত্র	পরিসংখ্যান	পরিসংখ্যান
পরিবার	Hypothesis test	Hypothesis test
উদ্ভবের বছর	1954	1904
প্রবর্তক	Robert F. Tate	Charles Spearman
ধরন	Parametric correlation coefficient	Nonparametric rank-based correlation
মৌলিক উৎস	Tate, R. F. (1954). Correlation between a discrete and a continuous variable. Point-biserial correlation. Annals of Mathematical Statistics, 25(3), 603–607.	Spearman, C. (1904). The proof and measurement of association between two things. The American Journal of Psychology, 15, 72–101.
অপর নাম	rpb, r_pb, point biserial r, item-total correlation	Spearman's rho, Spearman rank-order correlation, Spearman Sıra Korelasyonu
সম্পর্কিত	4	4
সারসংক্ষেপ	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 Spearman rank correlation coefficient (ρ) is a nonparametric measure of the monotonic association between two variables. Introduced by Charles Spearman in 1904, it converts raw observations to ranks and measures how consistently one variable increases as the other increases, without assuming a normal distribution or a linear relationship.