A study to determine the effectiveness of a drug (serum) for arthritis resulted in the comparison of
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You want to know whether these data present sufficient evidence to indicate that the serum was effective in improving the condition of arthritic patients.
a. Use the chi-square test of homogeneity to compare the proportions improved in the populations of treated and untreated subjects. Test at the 5% level of significance.
b. Test the equality of the two binomial proportions using the two-sample z-test of Section 9.6. Verify that the squared value of the test statistic z2 = X2 from part a. Are your conclusions the same as in part a?
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Related Book For
Introduction To Probability And Statistics
ISBN: 9781133103752
14th Edition
Authors: William Mendenhall, Robert Beaver, Barbara Beaver
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