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 8.9 1.2 6.2 12.8 8.8 10.4 3.9 0.8 After 6.1 2.1 7.7 8.5 8.5 6.1 3.6 2.2 ... 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 includes zero. B. Yes, because the confidence interval does not include and is entirely greater than zero. O C. No, because the confidence interval does not include and is entirely greater than zero. D. No, because the confidence interval includes zero.

A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
icon
Related questions
Question

2.

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
8.9
1.2
6.2
12.8
8.8
10.4
3.9
0.8
After
6.1
2.1
7.7
8.5
8.5
6.1
3.6
2.2
...
Construct a 95% confidence interval for the mean of the "before- after" differences.
<Hd <
(Round to two decimal places as needed.)
Does hypnotism appear to be effective in reducing pain?
O A. Yes, because the confidence interval includes zero.
B. Yes, because the confidence interval does not include and is entirely greater than
zero.
C. No, because the confidence interval does not include and is entirely greater than
zero.
O D. No, because the confidence interval includes 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 8.9 1.2 6.2 12.8 8.8 10.4 3.9 0.8 After 6.1 2.1 7.7 8.5 8.5 6.1 3.6 2.2 ... Construct a 95% confidence interval for the mean of the "before- after" differences. <Hd < (Round to two decimal places as needed.) Does hypnotism appear to be effective in reducing pain? O A. Yes, because the confidence interval includes zero. B. Yes, because the confidence interval does not include and is entirely greater than zero. C. No, because the confidence interval does not include and is entirely greater than zero. O D. No, because the confidence interval includes zero.
Expert Solution
steps

Step by step

Solved in 2 steps with 2 images

Blurred answer