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Section 9.3 Homework Question 6
Section 9.3 Homework
6. 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?
Construct a 95% confidence interval for the mean of the “beforeafter” differences.
Does hypnotism appear to be effective in reducing pain?
- Yes, because the confidence interval includes zero.
- Yes, because the confidence interval does not include and is entirely greater than zero.
- No, because the confidence interval includes zero.
- No, because the confidence interval does not include and is entirely greater than