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 74 69 94 70 97 85 90 75 89 81 Use a 0.01 significance level to test the claim that people do better with the new edition. Assume the standard deviation is 10.5. (Note: You may wish to use statistical software.) (a) What kind of test should be used? A. One-Tailed B. Two-Tailed C. It does not matter. (b) The test statistic is (rounded to 2 decimals). (c) The P-value is
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 | 74 | 69 | 94 | 70 | 97 | 85 | 90 | 75 | 89 | 81 |
Use a 0.01 significance level to test the claim that people do better with the new edition. Assume the standard deviation is 10.5. (Note: You may wish to use statistical software.)
(a) What kind of test should be used?
A. One-Tailed
B. Two-Tailed
C. It does not matter.
(b) The test statistic is
(rounded to 2 decimals).
(c) The P-value is
(d) Is there sufficient evidence to support the claim that people do better than 75 on this exam?
A. Yes
B. No
(e) Construct a 99% confidence interval for the mean score for students using the new text.
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