Rank Correlation

In statistics, rank correlation is the study of relationships between different rankings on the same set of items. It deals with measuring correspondence between two rankings, and assessing the significance of this correspondence.
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A rank correlation coefficient is a coefficient of correlation between two random variables that is based on the ranks of the measurements and not the actual values, for example, see Spearman R , Kendall tau , Gamma . Detailed discussions of rank correlations can be found in Hays (1981), Kendall (1948, 1975), Everitt (1977), and Siegel and Castellan (1988). See also Nonparametric Statistics .

Rank correlation
(Econ) Tương quan bậc.+ Phương pháp đo mức độ mà hai biến số liên quan với nhau, không nhất thiết theo giá trị mà theo bậc.
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