A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before treatment, 16 subjects had a mean wake time of 102.0 min. After treatment, the 16 subjects had a mean wake time of 96.9 min and a standard deviation of 21.5 min.
Assume that the 16 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 102.0 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 < μ < _____ min (Round to one decimal place as needed)
What does the result suggest about the mean wake up time for a population with the treatment.
The confidence interval (1) ________ the mean wake up time of 102.0 min before the treatment, so the means before and after the treatment (2)_________. This result suggests that the drug treatment (3)_______.
(1) Includes
Does not include
(2) Are different
Could be the same
(3) Has
Does not have