Determine if driver-s education course improves scores


In order to determine whether or not a driver's education course improves the scores on a driving exam, a sample of 6 students were given the exam before and after taking the course. The results are shown below.

Student Score before the course Score after the course
1 83 87
2 89 88
3 93 91
4 77 77
5 86 93
6 79 83

a. What is the average improvement on the scores after taking the course?

b. At 90% confidence using the critical value approach, test to see if taking the course actually increased scores on the driving exam.

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Basic Statistics: Determine if driver-s education course improves scores
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