Question
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.
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
"beforeafter"
differences. Does hypnotism appear to be effective in reducing pain?
Before | 8.0 | 2.6 | 7.0 | 13.2 | 6.4 | 6.6 | 8.1 | 6.9 | |
---|---|---|---|---|---|---|---|---|---|
After | 6.2 | 2.9 | 7.6 | 8.3 | 8.3 | 6.3 | 3.8 | 2.4 |
Question content area bottom
Part 1
Construct a 95% confidence interval for the mean of the
"beforeafter"
differences.
enter your response here (Round to two decimal places as needed.) Part 2 Does hypnotism appear to be effective in reducing pain? A. No, because the confidence interval doesnotincludeandisentirelygreaterthan zero. B. Yes, because the confidence interval doesnotincludeandisentirelygreaterthan zero. C. Yes, because the confidence interval includeszero. D. No, because the confidence interval includeszero.
Step by Step Solution
There are 3 Steps involved in it
Step: 1
Get Instant Access to Expert-Tailored Solutions
See step-by-step solutions with expert insights and AI powered tools for academic success
Step: 2
Step: 3
Ace Your Homework with AI
Get the answers you need in no time with our AI-driven, step-by-step assistance
Get Started