WILCOXON RANK TEST
\wˈɪlkɒksən ɹˈaŋk tˈɛst], \wˈɪlkɒksən ɹˈaŋk tˈɛst], \w_ˈɪ_l_k_ɒ_k_s_ə_n ɹ_ˈa_ŋ_k t_ˈɛ_s_t]\
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A class of statistical methods applicable to a large set of probability distributions used to test for correlation, location, independence, etc. In most nonparametric statistical tests, the original scores or observations are replaced by another variable containing less information. An important class of nonparametric tests employs the ordinal properties of the data. Another class of tests uses information about whether an observation is above or below some fixed value such as the median, and a third class is based on the frequency of the occurrence of runs in the data. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed, p1284; Corsini, Concise Encyclopedia of Psychology, 1987, p764-5)
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