[A, SfS] Chapter 6: Hypothesis Testing: 6.3: Test for Population Mean Difference
Hypothesis Test for a Population Mean Difference
A group of eight subjects with high cholesterol levels were given a new drug that was designed to lower cholesterol levels. Cholesterol levels, in mg/dL, were measured before and after the treatment for each subject, with the following results:
Can we conclude, at significance level #\alpha = 0.01#, that the population mean reduction in cholesterol level is larger than #75#mg/dL, assuming normality? Compute the appropriate P-value. Use 3 decimal places in your answer.
| Subject | Before | After |
| 1 | 283 | 215 |
| 2 | 299 | 206 |
| 3 | 274 | 187 |
| 4 | 284 | 212 |
| 5 | 248 | 178 |
| 6 | 275 | 212 |
| 7 | 293 | 192 |
| 8 | 277 | 196 |
| #P=# |
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