12) A teacher uses two different CAI programs to remediate a randomly selected group of students. Results for each group on a standardized test are listed in a table below. At the 0.05 level of significance, we want to test the hypothesis that the sample results are from populations with identical distributions. State the alternative hypothesis and the test statistic:
Program I   75 64 59 72 86
Program II  66 80 91 76 94

A) Ha: D1 is shifted to the left or to the right of D2. Test stat: 3
B) Ha: D1 is shifted to the left of D2. Test stat: 35
C) Ha: D1 is shifted to the left or to the right of D2. Test stat: 20
D) Ha: D1 is shifted to the left or to the right of D2. Test stat: 32