Chi-Square Test of Hypothesis for Independence of Variables
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Which Treatment is Better?
A randomized controlled trial was designed to compare the effectiveness of splinting against 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., Hornal 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?
Successful Treatment Unsuccessful Treatment
Splint Treatment 60 23
Surgery Treatment 67 6.
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Solution Summary
Uses chi squared test for independence of variables to test the hypothesis that success is independent of the type of treatment.
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