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See also: CorrCoeff, IsMonotone, KendallsTau, KruskalGamma, Spearman's Rank Correlation Table 

SpearmanRankCorr

Declaration:TCurveFit.SpearmanRankCorr: double;
The read-only property SpearmanRankCorr returns Spearman's rank correlation coefficient which is a measure of the strength of dependence between the x- and y-values entered by the method EnterStatValue. It assesses how well the relationship between two variables can be described using a monotonic function. Note, that at least 3 data pairs have to be entered to calculate a valid coefficient.

Hint: Further background information on Spearman's rank correlation coefficient can be found in Fundamentals of Statistics.