Obsessive-Compulsive Disorder The contingency table shows the results of a random sample of patie 1 answer below »

Obsessive-Compulsive Disorder The contingency table shows the results of a random sample of patie 1 answer below »

Obsessive-Compulsive Disorder The contingency table shows the results of a random sample of patients with obsessive-compulsive disorder after being treated with a drug or with a placebo. At a = 0.10, perform a homogeneity of proportions test on the claim that the proportions of the results for drug and placebo treatments are the same.

 

Result

Drug

Placebo

Improvement

39

25

No change

54

70

25. Is the chi-square homogeneity of proportions test a left-tailed, right-tailed, or two-tailed test?

26. Explain how the chi-square independence test is different from the chi-square homogeneity of proportions test.

 

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