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 70 88 86 91 93 96 75 73 69 Use a 0.01 significance level to test the claim that people do better with the new edition. Assume the standard deviation is 10.3. (Note: You may wish to use statistical software.) (a) What kind of test should be used? A. Two-Tailed B. One-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
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 | 70 | 88 | 86 | 91 | 93 | 96 | 75 | 73 | 69 |
Use a 0.01 significance level to test the claim that people do better with the new edition. Assume the standard deviation is 10.3. (Note: You may wish to use statistical software.)
(a) What kind of test should be used?
A. Two-Tailed
B. One-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.
? < μ < ?
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