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 100.0 min. After​ treatment, the 25 subjects had a mean wake time of 91.5 min and a standard deviation of 22.6 min. Assume that the 25 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 100.0 min before the​ treatment? Does the drug appear to be​ effective?       Question content area bottom Part 1 Construct the 99​% confidence interval estimate of the mean wake time for a population with the treatment.     min<μ< min ​(Round to one decimal place as​ needed.)

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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
100.0
min. After​ treatment, the
25
subjects had a mean wake time of
91.5
min and a standard deviation of
22.6
min. Assume that the
25
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
100.0
min before the​ treatment? Does the drug appear to be​ effective?
 
 
 

Question content area bottom

Part 1
Construct the
99​%
confidence interval estimate of the mean wake time for a population with the treatment.
 
 
min<μ<
min
​(Round to one decimal place as​ needed.)
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