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...

Extracted text: 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 "before - after" differences. Does hypnotism appear to be effective in reducing pain? Before 5.0 5.9 9.4 11.4 8.4 9.0 5.4 1.1 After 6.5 2.5 7.8 8.8 8.2 6.9 3.9 2.2 Construct a 95% confidence interval for the mean of the "before - after" differences. |