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J. F. Steffensen 《Scandinavian actuarial journal》2013,2013(1-2):13-33
Abstract 1. In an earlier Note1 I have suggested to measure the dependence between statistical variables by the expression where pij is the probability that x assumes the value xi and y the value yj , while By is meant summation with respect to all i and j for which pij > pi* p*j . 相似文献