Wilcoxon rank sum test ; Wilcoxon's test ; Wilcoxon-Mann-Whitney test ; Mann-Whitney test ; U- <td>test sumy rang Wilcoxona ; test Wilcoxona ; test Manna-Withneya</td></tr> <title>Wilcoxon signed rank test - test rangowych znaków Wilcoxona ; test rangowanych znaków Wilcoxona