A study was conducted to measure the effectiveness of a hypnotism in reducing pain. The measurements are centimeters on a pain scale before and after hypnosis.
| before |
9.7 |
6.0 |
10.4 |
11.2 |
8.1 |
5.6 |
5.7 |
0.2 |
| After |
6.9 |
2.4 |
7.8 |
8.5 |
8.4 |
6.8 |
3.5 |
2.1 |
Construct a 95% confidence interval for the mean of the "before-after" differences