A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before treatment, 18 subjects had a mean wake time of 100.0 min. After treatment, the 18 subjects had a mean wake time of 93.2 min and a standard deviation of 20.7 min. Assume that the 18 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 100.0 min before the treatment? Does the drug appear to be effective?
A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before treatment,
18 subjects had a mean wake time of
100.0 min. After treatment, the
18 subjects had a mean wake time of
93.2 min and a standard deviation of
20.7 min. Assume that the
18 sample values appear to be from a
95% confidence
100.0 min before the treatment? Does the drug appear to be effective?
Construct the
95% confidence interval estimate of the mean wake time for a population with the treatment.
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