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Wilcoxon Rank-Sum Test
Let us consider another hypothetical situation. The WHO wants to compare the mortality rates of children under the age of five years of underdeveloped and developed regions of the world. There were two independent samples of ten countries from each of the groups drawn at the same time, and the yearly mortality rates of children under the age of five years (per 100,000) inhabitants were reported (MRate1 and MRate2).
Mortality Rates of Children
Country
MRate1
MRate2
1
120
11
2
110
9
3
105
13
4
61
5
45
14
6
114
7
118
10
8
138
85
70
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