In order to find out whether or not driver's education course enhances the scores on driving exam, a sample of six students were given the exam before and after taking the course. The results are shown below.
Let d = Score After - Score Before.
Score Score
Student Before the Course After the Course
1 83 87
2 89 88
3 93 91
4 77 77
5 86 93
6 79 83
Employ ? = 0.1 and test to see if taking the course actually raised scores on driving exam.