This question: 1 point(s) possible Submit quiz 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 5.9 5.5 5.8 After 6.5 6.6 8.2 11.4 2.6 6.8 7.3 1.4 8.4 8.4 6.9 3.6 2.7 Construct a 95% confidence interval for the mean of the "before - after" differences.