why do zero comparisons in the wilcoxon procedure occur in both a statistical analysis and a ranked analysis? what is the difference between a standard wilcoxon signed statistic and a ranked statistic why does wilcoxon signed statistic have zero difference why does this test not have one pair of values why are zero differences not included in the wilcoxon ranked test why do we discard data why do we discard pairs what is the wilcoxon procedure why do we not discard a pair during the wilcoxon signed ranking? how do equal values affect wilcoxon signed scores what is the purpose of the wilcoxon sign for z when does wilcoxon sign ranked test work what wilcoxon signed test why do we discard the same pair from the wilcoxon sign ranked test? what is the purpose of the wilcoxon signed statistic what is the purpose of this wilcoxon test why do we use zero differences when we are looking for the median which statistic does not include zero differences in a wilcoxon signed statistic? which statement describes the way wilcoxon signed test is used to compute a statistic? why does wilcoxon signed ranked work