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 9.3 6.8 6.9 10.3 7.3 9.2 3.5 1.1   After 6.5 2.1 7.4 8.5 8.8 6.6 3.3 2.8 Construct a​ 95% confidence interval for the mean of the ​"before−​after" differences.     <μd<   ​(Round to two decimal places as​ needed.)

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
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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
9.3
6.8
6.9
10.3
7.3
9.2
3.5
1.1
 
After
6.5
2.1
7.4
8.5
8.8
6.6
3.3
2.8
Construct a​ 95% confidence interval for the mean of the
​"before−​after"
differences.
 
 
<μd<
 
​(Round to two decimal places as​ needed.)
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A study was conducted to measure the e ectiveness 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 di erences
have a distribution that is approximately normal. Use a 0:10 signi cance level to test
the claim that the the hypnotism is e ective in reducing pain.
test statistic = ?1:868431982; p-value = 0:0519584292

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