A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before treatment, 20 subjects had a mean wake time of 101.0 min. After treatment, the 20 subjects had a mean wake time of 91.5 min and a standard deviation of 23.1 min. Assume that the 20 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 101.0 min before the treatment? Does the drug appear to be effective? Construct the 99% confidence interval estimate of the mean wake time for a population with the treatment. |min<< '☐ › min (Round to one decimal place as needed.)

MATLAB: An Introduction with Applications
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A clinical trial was conducted to test the effectiveness of a drug for treating
insomnia in older subjects. Before treatment, 20 subjects had a mean wake
time of 101.0 min. After treatment, the 20 subjects had a mean wake time of
91.5 min and a standard deviation of 23.1 min. Assume that the 20 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
101.0 min before the treatment? Does the drug appear to be effective?
Construct the 99% confidence interval estimate of the mean wake time for a
population with the treatment.
|min<<
'☐ ›
min
(Round to one decimal place as needed.)
Transcribed Image Text:A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before treatment, 20 subjects had a mean wake time of 101.0 min. After treatment, the 20 subjects had a mean wake time of 91.5 min and a standard deviation of 23.1 min. Assume that the 20 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 101.0 min before the treatment? Does the drug appear to be effective? Construct the 99% confidence interval estimate of the mean wake time for a population with the treatment. |min<< '☐ › min (Round to one decimal place as needed.)
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