Question

A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before​ treatment, 25 subjects had a mean wake time of 105.0 min. After​ treatment, the 25 subjects had a mean wake time of 81.6 min and a standard deviation of 23.9 min. Assume that the 25 sample values appear to be from a normally distributed population and construct a 95% 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 105.0 min before the​ treatment? Does the drug appear to be​ effective?

a) Construct the 95​% confidence interval estimate of the mean wake time for a population with the treatment.

b) What does the result suggest about the mean wake time of 105.0 min before the​ treatment? Does the drug appear to be​ effective?

The confidence interval (does not include/includes) the mean wake time of 105.0 min before the treatment, so the mean before and after the treatment (could be the same/are different). This result suggests that the drug treatment (does not have/ has) a significant effect.

Answer 1