Spearman Rank Correlation Coefficient

The Spearman rank correlation coefficient (rS) is a means of measuring the strength of the association between two ordinally ranked entities. It has limits of +1 and -1.

324 Specificity where d is the difference in the rank order and n is the number of ranks. Cf. Pearson's correlation coefficient r. Named after the British psychologist and statistician Charles Edward Spearman (1863-1945).

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