
Chapter 18
PB
Non-Parametric Statistics
771
18B1. Use Mann–Whitney U test to determine whether
there is a signi cant difference in the data about two
groups provided in the table below. Use a = 0.05.
Group 1 Group 2
17 25
19 27
14 29
15 31
16 32
12 31
21 30
18B2. Use Mann–Whitney U test to determine whether
there is a signi cant difference in the data about two
groups provided in the table below. Use a = 0.05.
Group 1 Group 2
150 196
155 198
160 199
145 205
148 189
152 176
156 190
160 192
170 186
175 188
180 192
165 198
SELF-PRACTICE PROBLEMS
18.4 WILCOXON MATCHED-PAIRS SIGNED RANK TEST
The Mann–Whitney U test is an alternative to the t-Test to compare the means ...