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 101.0
min. After treatment, the 18 subjects had a mean wake time of
94.7 min and a standard deviation of 21.1 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 101.0 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 trea
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A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before trea
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