Question

A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before​ treatment, 15 subjects had a mean wake time of 100.0min. After​ treatment, the 15 subjects had a mean wake time of 95.5min and a standard deviation of 22.8min. Assume that the 15sample 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 100.0min before the​ treatment? Does the drug appear to be​ effective? Construct the 90​% confidence interval estimate of the mean wake time for a population with the treatment. _min

Answer 1

from above: 90​% confidence interval estimate of the mean wake time =82.873 ; 108.127

as above interval contains 100 as plausible population mean value therefore drug does not appear to be effective