Essentials of Statistics (6th Edition)
6th Edition
ISBN: 9780134685779
Author: Mario F. Triola
Publisher: PEARSON
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Textbook Question
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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Students have asked these similar questions
Splint or Surgery? A randomized controlled trial was designed to compare 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
treatment. Using a 0.01 significance level, test the claim that success is independent of the type of treatment.
Successful Treatment
Unsuccessful Treatment
Splint Treatment
Surgery Treatment
60
23
67
6.
Họ: p = 0 (Success is dependent of the type of treatment.)
HA: p +0 (Success is independent of the type of treatment.)
Hypothesis Test:
(row total) x (column total)
(Expected count) E =
table total
Test Statistic:
(01- E1)?, (02- E2)?
+
X = EE
(0-E)²
(Ok- Ek)²
1-א
X =
+... +
E1
E2
Ek
P-value
df= (r - 1)(c - 1) =
a =
Decision:
Conclusion:
Not sure how to do this
27. No Variation in a Sample An experiment was conducted to test the effects of alcohol. Re-
searchers measured the breath alcohol levels for a treatment group of people who drank ethanol
and another group given a placebo. The results are given below (based on data from "Effects of
Alcohol Intoxication on Risk Taking, Strategy, and Error Rate in Visuomotor Performance," by
Streufert et al., Journal of Applied Psychology, Vol. 77, No. 4). Use a 0.05 significance level to
test the claim that the two sample groups come from populations with the same mean.
Treatment Group: nj
22, x¡
0.049, s = 0.015
%3D
%3D
Placebo Group: n = 22, x,
0.000, s, = 0.000
%3D
%3D
Chapter 11 Solutions
Essentials of Statistics (6th Edition)
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