Question

A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before​ treatment, 14

subjects had a mean wake time of 102.0 min. After​ treatment, the 14 subjects had a mean wake time of

97.4 min and a standard deviation of 23.2 min. Assume that the 14 sample values appear to be from a normally distributed population and construct a

90​% confidence interval estimate of the 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?

Answer 1