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...

Question 10

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 nomal. Construct a 95% confidence interval for the mean of the "before - after" differences. Does hypnotism appear to be effective in reducing pain? Before 5.5 6.1 5.9 11.0 9.1 7.5 8.1 After 6.9 2.6 74 8.5 8.7 6.4 3.8 Construct a 95% confidence interval for the mean of the "before-after differences. O