11. 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 103.0 min. After treatment, the 25 subjects had a mean wake time of 82.7 min and a standard deviation of 23.5 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 103.0min 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.
11. A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before treatment, 25 subjects had a
Construct the 95% confidence interval estimate of the mean wake time for a population with the treatment.
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