A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before treatment, 19 subjects had a mean wake time of 105.0 min. After treatment, the 19 subjects had a mean wake time of 83.3 min and a standard deviation of 22.1 min. Assume that the 19 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 105.0 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. __min
A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before treatment, 19 subjects had a
min. After treatment, the 19 subjects had a mean wake time of 83.3 min and a standard deviation of 22.1 min. Assume that the 19
sample values appear to be from a
Construct the 95% confidence interval estimate of the mean wake time for a population with the treatment.
__min <u<__min
Round to one decimal place as needed.
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