A high school is examining whether or not a certain collegeadmissions test prep course is helpful. To evaluate this, 15students took the college admissions test. Afterwards, they wentthrough the prep course and then took the admissions test again.Their before and after scores are shown below. With a significancelevel of 0.90, is the admissions test prep course effective?
Student Before After
1 27 29
2 28 29
3 30 31
4 32 31
5 16 20
6 25 27
7 27 27
8 25 26
9 27 30
10 23 28
11 25 26
12 24 24
13 22 25
14 31 32
15 25 25
