Question
A study was conducted to measure the effectiveness of hypnotism in reducing pain. The measurements are...
A study was conducted to measure the effectiveness of hypnotism in reducing pain. The measurements are centimeters on a pain scale before and after hypnosis. Assume that the paired sample data are simple random samples and that the differences have a distribution that is approximately normal. Construct a 95% confidence interval for the mean of the "beforeminus−after" differences. Does hypnotism appear to be effective in reducing pain?
|
Before |
8.48.4 |
5.25.2 |
9.59.5 |
7.17.1 |
12.612.6 |
5.05.0 |
3.43.4 |
0.20.2 |
|
|---|---|---|---|---|---|---|---|---|---|
|
After |
6.36.3 |
2.12.1 |
7.37.3 |
8.48.4 |
8.58.5 |
6.56.5 |
3.23.2 |
2.1 |
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