A study is conducted to determine if a newly designed text book is more helpful to learning the material than the old edition. The mean score on the final exam for a course using the old edition is 75. Ten randomly selected people who used the new text take the final exam. Their scores are shown in the table below. Person A B C D E F G H I J
Test Score 80 67 73 71 79 96 85 95 91 87

Use α= 0.05 significance level to test the claim that people do better with the new edition.

1. What kind of test should be used?

a. Two-Tailed
b. One-Tailed
c. It does not matter.

2. The test statistic is:
3. The P-value is:
4. Is there sufficient evidence to support the claim that people do better than 75 on this exam?

a. Yes
b. No

5. Construct a 95% confidence interval for the mean score for students using the new text.