Spearman's rank correlation coefficient
= Spearman's rank correlation coefficient
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{title2=$\rho_s=\operatorname{Corr}(\operatorname{rank}X,\operatorname{rank}Y)$}
= Spearman rank correlation
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{synonym}
A <correlation coefficient> computed from ranks, measuring monotone association. Ties need a stated ranking convention. A strong nonlinear but monotone relationship can have a strong <Spearman rank correlation> even when a straight-line summary in the original units is inappropriate.