I thought I go the hang of this, but I'm stuck again.

A clinical trial was conducted to test the effectiveness of e drug for treating insomnia in older subjects Before treatment, 20 subjects had a mean wake time of 1020 mim After treatment, the 20 subjects had a mean wake time of 726 min and a standard deviation of 23.2 min. Assume that the 20 sample values appear to be from a normally distributed population and construct a confidence Interval estimate ofthe mean wake time for a population With drug treatments. What does the result suggest about the mean wake time of 102 0 min before the treatment? Does the drug appear to be effective? Construct the confidence interval estimate of the mean wake time for a population with the treatment (Round to one decimal place as needed.)