Wilcoxon Z Table. The Wilcox Sign Test answers the question if the difference is significantly different from zero and thus if the observed difference in mean ranks 45 vs. The Wilcoxon rank-sum test statistic is the sum of the ranks for observations from one of the samples.
The effect size r is calculated as Z statistic divided by the square root of the sample size N ZsqrtN. This particular test is also called the Wilcoxon matched pairs test or the Wilcoxon signed rank testIt is very appropriate for a repeated measure design where the same subjects are evaluated under two different conditions such as with the water maze temperature experiment in Table 83It is the nonparametric equivalent of the parametric paired t-test. Compare your obtained value of Wilcoxons test statistic to the critical value in the table taking into account N the number of subjects.
Critical Values of the Wilcoxon Signed Ranks Test Two-Tailed Test One-Tailed Test n α 05 α 01 α 05 α 01 5 -- -- 0 -- 6 0 -- 2 -- 7 2 -- 3 0 8 3 0 5 1 9 5 1 8 3 10 8 3 10 5 11 10 5 13 7 12 13 7 17 9 13 17 9 21 12 14 21 12 25 15 15 25 15 30 19 16 29 19 35 23 17 34 23 41 27.
The Wilcoxon Signed-Ranks Test Calculator. To use this table. 1065 can also be found in the general population. In particular it is suitable for evaluating the data from a repeated-measures design in a situation where the prerequisites for a dependent samples t-test are not met.
