Elementary Statistics - Excel Statistics Laboratory Manual
13th Edition
ISBN: 9780134464275
Author: Triola
Publisher: PEARSON
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Chapter 11.2, Problem 6BSC
In Exercises 5-18, test the given claim.
6. Splint or Surgery? A randomized controlled trial was designed to compare the effectiveness of splinting versus surgery in the treatment of carpal tunnel syndrome. Results are given in the table below (based on data from “Splinting vs. Surgery in the Treatment of Carpal Tunnel Syndrome,” by Gerritsen et al., Journal of the American Medical Association, Vol. 288, No. 10). The results are based on evaluations made one year after the treatment. Using a 0.01 significance level, test the claim that success is independent of the type of treatment. What do the results suggest about treating carpal tunnel syndrome?
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Is injecting medical cement effective in reducing pain for people who have suffered fractured vertebrae? A paper describes an experiment to compare patients who underwent vertebroplasty (the injection of cement) to patients in a placebo group who underwent a fake procedure in which no cement was actually injected. Because the placebo procedure was similar to the vertebroplasty procedure except for the actual injection of cement, patients participating in the experiment were not aware of which treatment they received.
All patients were asked to rate their pain at three different times—3 days, 14 days, and 1 month after the procedure. Summary statistics are given in the accompanying table.
Pain Intensity
Vertebroplasty Group
Placebo Group
n = 76
n = 62
mean
sd
mean
sd
3 days
4.2
2.8
3.9
2.9
14 days
4.3
2.9
4.5
2.8
1 month
3.9
2.9
4.6
3.0
Construct and interpret a 95% confidence interval for the difference in mean pain intensity 3 days after treatment for the…
Chapter 11 Solutions
Elementary Statistics - Excel Statistics Laboratory Manual
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