A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before treatment, 22 subjects had a mean wake time of 100.0 min. After treatment, the 22 subjects had a mean wake time of 96.7 min and a standard deviation of 24.8 min. Assume that the 22 sample values appear to be from a normally distributed population and construct a 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 100.0 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. min

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A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before treatment, 22 subjects had a mean wake time of 100.0
min. After treatment, the 22 subjects had a mean wake time of 96.7 min and a standard deviation of 24.8 min. Assume that the 22 sample values appear to be from a
normally distributed population and construct a 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 100.0 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.
min <µ<
min
(Round to one decimal place as needed.)
What does the result suggest about the mean wake time of 100.0 min before the treatment? Does the drug appear to be effective?
The confidence interval
V the mean wake time of 100.0 min before the treatment, so the means before and after the treatment
a significant effect.
This result suggests that the drug treatment
Transcribed Image Text:A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before treatment, 22 subjects had a mean wake time of 100.0 min. After treatment, the 22 subjects had a mean wake time of 96.7 min and a standard deviation of 24.8 min. Assume that the 22 sample values appear to be from a normally distributed population and construct a 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 100.0 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. min <µ< min (Round to one decimal place as needed.) What does the result suggest about the mean wake time of 100.0 min before the treatment? Does the drug appear to be effective? The confidence interval V the mean wake time of 100.0 min before the treatment, so the means before and after the treatment a significant effect. This result suggests that the drug treatment
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