Question

In: Statistics and Probability

A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in...

A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before​ treatment,23 subjects had a mean wake time of 104.0 min. After​ treatment, the 23 subjects had a mean wake time of 79.5 min and a standard deviation of 23.92 min. Assume that the 23 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 104.0 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< mu<___min

Solutions

Expert Solution


Related Solutions

A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in...
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 103.0 min. After​ treatment, the 18 subjects had a mean wake time of 78.4 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...
A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in...
A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before​ treatment, 15 subjects had a mean wake time of 105.0 min. After​ treatment, the 15 subjects had a mean wake time of 99.7 min and a standard deviation of 24.3 min. Assume that the 15 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...
A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in...
A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before​ treatment, 2323 subjects had a mean wake time of 100.0100.0 min. After​ treatment, the 2323 subjects had a mean wake time of 74.674.6 min and a standard deviation of 20.920.9 min. Assume that the 2323 sample values appear to be from a normally distributed population and construct a 9999​% confidence interval estimate of the mean wake time for a population with...
A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in...
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 103.0 min. After​ treatment, the 19 subjects had a mean wake time of 76.3 min and a standard deviation of 23.4 min. Assume that the 19 sample values appear to be from a normally distributed population and construct a 99​% confidence interval estimate of the mean wake time for a population with...
A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in...
A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before​ treatment,13 subjects had a mean wake time of 100.0 min. After​ treatment, the13 subjects had a mean wake time of 93.5 min and a standard deviation of 20.7 min. Assume that the13 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...
A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in...
A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before​ treatment, 2121 subjects had a mean wake time of 102.0102.0 min. After​ treatment, the 2121 subjects had a mean wake time of 95.695.6 min and a standard deviation of 20.120.1 min. Assume that the 2121 sample values appear to be from a normally distributed population and construct a 9595​% confidence interval estimate of the mean wake time for a population with...
A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in...
A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before​ treatment, 25 subjects had a mean wake time of 100.0 min. After​ treatment, the 25 subjects had a mean wake time of 96.7 min and a standard deviation of 21.8 min. Assume that the 25 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...
A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in...
A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before​ treatment, 21 subjects had a mean wake time of 104.0 min. After​ treatment, the 21 subjects had a mean wake time of 99.9 min and a standard deviation of 24.5 min. Assume that the 21 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...
A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in...
A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before​ treatment, 13 subjects had a mean wake time of 103.0 min. After​ treatment, the 13 subjects had a mean wake time of 97.9 min and a standard deviation of 21.8 min. Assume that the 13 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...
A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in...
A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. After​ treatment, the 20 subjects had a sample mean wake time of 93.8 minutes and a sample standard deviation of 21.6 minutes. Assume that the sample values appear to be from a normally distributed population. Construct a 95% confidence interval estimate of the mean wake time for a population with drug treatments. a)     Verify that the conditions are met. Show your work....
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT