Please also include statistic test, p value, reject or fail to reject null hypothesis and why, confidence interval, and conclusion. Thanks

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 85 6.8 Co 8.2 31 After 63 84 34 Construct a 95% confidence interval for the mean of the "before - after" differences