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...

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 After
11.1 6.6
2.6 2.2
10.1 7.2
8.8 8.2
7.9 8.6
6.1 6.8
8.6 3.9
7.3 2.6

Construct a 95% confidence interval for the mean of the "before−after" differences.

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Does hypnotism appear to be effective in reducing pain?

Jun 04, 2022

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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...

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