A study was conducted to measure the effectiveness of hypnotism in reducing pain. The measurements are centimeters on a pain scale before and after hypnosis. Assume that the paired sample data are simple random samples and that the differences have a distribution tha is approximately normal. Construct a 95% confidence interval for the mean of the "before - after" differences. Does hypnotism appear to b effective in reducing pain? Before 11.7 5.2 10.1 13.0 13.0 5.5 4.2 6.9 After 6.8 2.9 7.8 8.2 8.4 6.1 3.3 2.8 Construct a 95% confidence interval for the mean of the "before - after" differences. > Prl>

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A study was conducted to measure the effectiveness of hypnotism in reducing pain. The measurements are centimeters on a pain scale
before and after hypnosis. Assume that the paired sample data are simple random samples and that the differences have a distribution that
is approximately normal. Construct a 95% confidence interval for the mean of the "before - after" differences. Does hypnotism appear to be
effective in reducing pain?
Before
11.7
5.2
10.1
13.0
13.0
5.5
4.2
6.9
After
6.8
2.9
7.8
8.2
8.4
6.1
3.3
2.8
Construct a 95% confidence interval for the mean of the "before - after" differences.
(Round to two decimal places as needed.)
Does hypnotism appear to be effective in reducing pain?
O A. Yes, because the confidence interval does not include zero and is entirely greater than zero.
O B. No, because the confidence interval includes zero.
C. Yes, because the confidence interval includes zero.
O D. No, because the confidence interval does not include zero and is entirely greater than zero.
Transcribed Image Text:A study was conducted to measure the effectiveness of hypnotism in reducing pain. The measurements are centimeters on a pain scale before and after hypnosis. Assume that the paired sample data are simple random samples and that the differences have a distribution that is approximately normal. Construct a 95% confidence interval for the mean of the "before - after" differences. Does hypnotism appear to be effective in reducing pain? Before 11.7 5.2 10.1 13.0 13.0 5.5 4.2 6.9 After 6.8 2.9 7.8 8.2 8.4 6.1 3.3 2.8 Construct a 95% confidence interval for the mean of the "before - after" differences. (Round to two decimal places as needed.) Does hypnotism appear to be effective in reducing pain? O A. Yes, because the confidence interval does not include zero and is entirely greater than zero. O B. No, because the confidence interval includes zero. C. Yes, because the confidence interval includes zero. O D. No, because the confidence interval does not include zero and is entirely greater than zero.
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