A Teacher Uses Two Different CAI Programs to Remediate a Randomly

Essay

A teacher uses two different CAI programs to remediate a randomly selected group of
students. Results for two independent samples on a standardized test are listed in a table
below. At the 0.05 level of significance, use the Wilcoxon rank-sum test to test the hypothesis
that the sample results are from populations with equal medians. $\begin{array}{|llll|llll|}\hline{\text { Program I }} &&&&{\text { Program II }} \\\hline 60 & 75 & 61 & 63 & 66 & 89 & 68 & 77 \\\hline 86 & 69 & 64 & 70 & 84 & 80 & 81 & 87 \\\hline 72 & 82 & 59 & 78 & 73 & 91 & 93 \\\hline & & & & 94 & 95 & & \\\hline\end{array}$