Question: To test a theory that alcohol consumption can have an effect on test scores, a researcher conducts a study 10 adults. Each is given a test. Then for one week, each subject is required to consume a certain amount of alcohol; then he or she is retested. The results are show here. Significance level=0.1, test the claim that alcohol does not affect a person’s test score

Subject Score before Score after

1 105 106

2 109 105

3 98 94

4 112 109

5 109 105

6 117 115

7 123 125

8 114 114

9 95 98

10 101 100