A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before treatment, min. After treatment, the 21 subjects had a mean wake time of 100.1 min and a standard deviation of 23.5 min. Assume normally distributed population and construct a 90% confidence interval estimate of the mean wake time for a population suggest about the mean wake time of 105.0 min before the treatment? Does the drug appear to be effective?

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before treatment,
min. After treatment, the 21 subjects had a mean wake time of 100.1 min and a standard deviation of 23.5 min. Assume
normally distributed population and construct a 90% confidence interval estimate of the mean wake time for a population
suggest about the mean wake time of 105.0 min before the treatment? Does the drug appear to be effective?
Transcribed Image Text:A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before treatment, min. After treatment, the 21 subjects had a mean wake time of 100.1 min and a standard deviation of 23.5 min. Assume normally distributed population and construct a 90% confidence interval estimate of the mean wake time for a population suggest about the mean wake time of 105.0 min before the treatment? Does the drug appear to be effective?
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