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 101.0 min. After treatment, the 19 subjects had a mean wake time of 96.6 min and a standard deviation of 20.9 min. Assume that the 19 sample values appear to be from a normally distributed population and construct a 90% 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? Construct the 90% confidence interval estimate of the mean wake time for a population with the treatment. 88.3 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 mean wake time of 101.0 min. After treatment, the 19 subjects had a mean wake time of 96.6 min and a standard deviation of 20.9 min. Assume that the 19 sample values appear to be from a normally distributed population and construct a 90% 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? Construct the 90% confidence interval estimate of the mean wake time for a population with the treatment. 88.3 min
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
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Transcribed Image Text: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 101.0
min. After treatment, the 19 subjects had a mean wake time of 96.6 min and a standard deviation of 20.9 min. Assume that the 19 sample values appear to be from
a normally distributed population and construct a 90% 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?
Construct the 90% confidence interval estimate of the mean wake time for a population with the treatment.
88.3 min <u< 104.9 min
(Round to one decimal place as needed.)
What does the result suggest about the mean wake time of 101.0 min before the treatment? Does the drug appear to be effective?
The confidence interval does not include the mean wake time of 101.0 min before the treatment, so the means before and after the treatment
could be the same. This result suggests that the drug treatment
a significant effect.
has
are different
could be the same
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Transcribed Image Text: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 101.0
min. After treatment, the 19 subjects had a mean wake time of 96.6 min and a standard deviation of 20.9 min. Assume that the 19 sample values appear to be from
a normally distributed population and construct a 90% 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?
Construct the 90% confidence interval estimate of the mean wake time for a population with the treatment.
88.3 min < u< 104.9 min
(Round to one decimal place as needed.)
What does the result suggest about the mean wake time of 101.0 min before the treatment? Does the drug appear to be effective?
The confidence interval does not include the mean wake time of 101.0 min before the treatment, so the means before and after the treatment
could be the same. Th
drug treatment
has
a significant effect.
does not include
includes
Click to select your answer(s) and then click Check Answer.
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