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 78.1 min and a standard deviation of 21.4 min. Assume that the 25 sample values appear to be from a normally distributed population and construct a 99​% 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?

Construct the 99% confidence interval estimate of the mean wake time for a population with the treatment.

minless than<muμless than< min

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 ▼ the mean wake time of 105.0 min before the​ treatment, so the means before and after the treatment ▼. This result suggests that the drug treatment ▼ a significant effect.

Answer 1