Use the Wilcoxon Rank-Sum Approach to Test the Claim That

question 153

Essay

Use the Wilcoxon rank-sum approach to test the claim that the two independent sample student
grade averages at two colleges come from populations with equal medians. The sample data is
listed below. Use a 0.05 level of significance, and assume that the samples were randomly
selected. $$\begin{array} { c c c c c c c c c c c c } \text { College A } & 3.2 & 4.0 & 2.4 & 2.6 & 2.0 & 1.8 & 1.3 & 0.0 & 0.5 & 1.4 & 2.9 \\\hline \text { College B } & 2.4 & 1.9 & 0.3 & 0.8 & 2.8 & 3.0 & 3.1 & 3.1 & 3.1 & 3.5 & 3.5\end{array}$$