Spearman's rank-order coefficient
a statistic measuring the extent to which two sets of discrete data place the distinct items in the same order, given by r S = 1 – 6 Σ d ² /n (n ² – 1), where Σ d ² is the sum of the squares of the differences of ranks between the two orderings and n is the number of items in eachAlso called: Spearman's rank-order correlation coefficient
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Word Origin for Spearman's rank-order coefficient
named after Charles E. Spearman (1863–1945), English mathematician and statistician
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012