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Transcribed Image Text:A clinical trial was conducted to test the effectiveness of a drug for treating insomnia
standard deviation of 20.4 min. Assume that the 20 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 104.0 min before the treatment? Does the drug appear to be effective?
older subjects. Before treatment, 20 subjects had a mean wake time of 104.0 min. After treatment, the 20 subjects had a mean wake tíme of 98.4 min and a
Construct the 95% confidence interval estimate of the meah wake time for a population with the treatment.
min <u<min
(Round to one decimal place as needed.)
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