Math  /  Data & Statistics

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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 100.7 min and a standard deviation of 20.8 min . Assume that the 25 sample values appear to be from a normally distributed population and construct a 90%90 \% 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 90\% confidence interval estimate of the mean wake time for a population with the treatment. \square \square min<μ<\min <\mu< min (Round to one decimal place as needed.)

Studdy Solution
93.6<μ<107.893.6 < \mu < 107.8 min.
The drug does *not* appear to be effective, as the mean wake time before treatment (105105 minutes) falls within our confidence interval.

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