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

16 subjects had a mean wake time of 102.0 min. After treatment, the 16 subjects had a mean wake time of 76.9 min and a standard deviation of 23.7 min. Assume that the 16 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 102.0 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.

What does the result suggest about the mean wake time of 102.0 min before the treatment? Does the drug appear to be effective?

Fill in the blank

The confidence interval does not include includes the mean wake time of 102.0 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 does not have has an effect.