Question

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

23 subjects had a mean wake time of 101.0min. After​ treatment, the 23 subjects had a mean wake time of 76.6

min and a standard deviation of 22.9min. Assume that the 23 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

101.0 min before the​ treatment? Does the drug appear to be​ effective?

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

-- ___min<u<___min ​ (Round to one decimal place as​ needed.)

What does the result suggest about the mean wake time of 101.0 min before the​ treatment? Does the drug appear to be​ effective? The confidence interval ▼ does not include includes the mean wake time of 101.0 min before the​ treatment, so the means before and after the treatment ▼ are different. could be the same. This result suggests that the drug treatment ▼ has does not have a significant effect.

Answer 1