Could someone help me with this problem? Thank you in advance!

A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before treatment, 22 subjects had a mean wake time of 100.0 min. After treatment, the 22 subjects had a mean wake time of 91.2 min and a standard deviation of 24.9 min. Assume that the 22 sample values appear to be from a normally distributed population and construct a 95% confidence interval estimate of the moan wake time for a population with drug treatments. What does the result suggest about the moan wake time of 100.0 min before the treatment? Does the drug appear to be effective? Construct the 95% confidence interval estimate of the mean wake time for a population with the treatment min = = min (Round to one decimal place as needed. )