Please show the work. It will really help me! Especially for the confidece interval.

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. Constmct a 95% condence interval for the mean ofthe "before-after\" differences. Does hypnotism appear to be eective in reducing pain? Before 8.? 0.6 9.2 10.5 12.3 5.3 3.2 0.3 la After 6.4 2.4 7.5 3.4 8.5 6.1 3.4 2.6 Construct a 95% condence interval for the mean of the "before atter" differences. D {pd