Compara mètodes

	Correlació de rang Tau de Kendall	Anàlisi de la mida de l'efecte
Camp	Estadística	Estadística
Família	Hypothesis test	Hypothesis test
Any d'origen	1938	1969 (first edition); 1988 (definitive second edition)
Autor original	Maurice G. Kendall	Jacob Cohen
Tipus	Nonparametric rank correlation	Standardized magnitude estimation
Font seminal	Kendall, M. G. (1938). A new measure of rank correlation. Biometrika, 30(1/2), 81–93.	Cohen, J. (1988). Statistical Power Analysis for the Behavioral Sciences (2nd ed.). Lawrence Erlbaum Associates. ISBN: 978-0805802832
Àlies	Kendall tau, Kendall rank correlation, tau-b, tau-c	effect magnitude estimation, standardized effect measure, practical significance analysis, ES analysis
Relacionats	4	4
Resum	Kendall's tau is a nonparametric measure of the ordinal association between two variables. It quantifies how consistently the relative ordering of one variable matches the ordering of another across all observation pairs, making it robust to outliers and suitable for ordinal or non-normally distributed data.	Effect size analysis quantifies the practical magnitude of a statistical result independently of sample size. Rather than asking only whether a difference or relationship is statistically significant, it asks how large it is, using standardized indices such as Cohen's d, eta-squared, omega-squared, or Pearson's r that allow direct comparison across studies and populations.