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 100.0 min. After​ treatment, the 15 subjects had a mean wake time of 70.3 min and a standard deviation of 22.6 min. Assume that the 15 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 100.0 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. nothing minless thanmuless than nothing min ​(Round to one decimal place as​ needed.) What does the result suggest about the mean wake time of 100.0 min before the​ treatment? Does the drug appear to be​ effective? The confidence interval ▼ includes does not include the mean wake time of 100.0 min before the​ treatment, so the means before and after the treatment ▼ could be the same. are different. This result suggests that the drug treatment ▼ has does not have a significant effect.

Answer 1

from above 99% CI =52.9 ; 87.7

he confidence interval does not include the mean wake time of 100.0 min before the​ treatment, so the means before and after the treatment are different This result suggests that the drug treatment has a significant effect.