Question
Students wish to test the effectiveness of a study guide they are using to improve scores...
Students wish to test the effectiveness of a study guide they are using to improve scores on a standardized test. The students each take two practice tests, one before using the study guide, and one after. Their scores are below. With alpha = 0.1, test the claim that the scores actually stayed the same.
| Before | After |
|---|---|
| 87 | 92 |
| 79 | 83 |
| 75 | 77 |
| 72 | 78 |
Homework Answers
Answer #1
Using paired t-test,
| Before | After |  |
 |
|
| 87 | 92 | 5 | 0.5625 | |
| 79 | 83 | 4 | 0.0625 | |
| 75 | 77 | 2 | 5.0625 | |
| 72 | 78 | 6 | 3.0625 | |
| Total | 17 | 8.75 |
So, the test score before and after using the study guide are stayed up same.
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