Question

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 80.9 min and a standard deviation of 20.4 min. Assume that the 13 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 103.0 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. nothing minless thanmuless than nothing min (Round to one decimal place as needed.) What does the result suggest about the mean wake time of 103.0 min before the treatment? Does the drug appear to be effective? The confidence interval ▼ includes does not include the mean wake time of 103.0 min before the treatment, so the means before and after the treatment ▼ could be the same. are different. This result suggests that the drug treatment ▼ has does not have a significant effect.

Answer #1

90 % confidence interval estimate of the mean wake time =70.8 ; 91.0

The confidence interval does not include the mean wake time of 103.0 min before the treatment, so the means before and after the treatment are different. This result suggests that the drug treatment has a significant effect.

A clinical trial was conducted to test the effectiveness of a
drug for treating insomnia in older subjects. Before treatment, 17
subjects had a mean wake time of 105.0 min. After treatment, the
17 subjects had a mean wake time of 95.6 min and a standard
deviation of 23.9 min. Assume that the 17 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 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 80.4 min and a standard
deviation of 22.3 min. Assume that the 13 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 older subjects. Before treatment, 16
subjects had a mean wake time of 104.0 min. After treatment, the
16 subjects had a mean wake time of 98.2 min and a standard
deviation of 22.8 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...

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 100.0 min. After treatment, the
15 subjects had a mean wake time of 70.3 min and a standard
deviation of 22.6 min. Assume that the 15 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 older subjects. Before treatment,14
subjects had a mean wake time of 101.0 min. After treatment,
the
14 subjects had a mean wake time of 96.3 min and a standard
deviation of 24.1 min. Assume that the 14 sample values appear to
be from a normally distributed population and construct
90% confidence interval estimate of the mean wake time for a
population with drug treatments....

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
104.0 min. After treatment, the 19
subjects had a mean wake time of 94.8 min and a standard
deviation of 24.5 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 drug...

A clinical trial was conducted to test the effectiveness of a
drug for treating insomnia in older subjects. Before
treatment,
1414
subjects had a mean wake time of
100.0100.0
min. After treatment, the
1414
subjects had a mean wake time of
78.578.5
min and a standard deviation of
22.722.7
min. Assume that the
1414
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 older subjects. Before
treatment,
25
subjects had a mean wake time of
103.0
min. After treatment, the
25
subjects had a mean wake time of
75.9
min and a standard deviation of
24.8
min. Assume that the
25
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 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 94.8 min and a standard
deviation of 24.9 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 older subjects. Before treatment, 25
subjects had a mean wake time of 103.0 min. After treatment, the 25
subjects had a mean wake time of 96.1 min and a standard deviation
of 22.8 min. Assume thay the 25 sample values appear to be from a
normally distrubuted population and construct a 95% confidence
interval estimate of the mean wake time for a population with...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 1 minute ago

asked 14 minutes ago

asked 15 minutes ago

asked 16 minutes ago

asked 21 minutes ago

asked 33 minutes ago

asked 36 minutes ago

asked 36 minutes ago

asked 53 minutes ago

asked 54 minutes ago

asked 1 hour ago

asked 1 hour ago