For the question, please state null and alternative hypotheses, provide observed

Question

For the question, please state null and alternative hypotheses, provide observed chi-square test value, and interpret the results in terms of the null hypothesis

In a study of the effectiveness of an antipsychotic drug, patients treated with the drug were compared to patients receiving a placebo. In terms of the number relapsing, 698 of 1,068 patients relapsed after taking the placebo while 639 out of 2,127 patients relapsed after taking the antipsychotic drug. Test the prediction that the antipsychotic is significantly more effective in preventing relapse than the placebo. Hint: feel free to use this online tool:http://www.socscistatistics.com/tests/chisquare/default2.aspx

Explanation / Answer

      H1: The antipsychotic is significantly more effective in preventing relapse than the placebo.

      Decision rule: If 2 +3.84 or if 2 -3.84, reject HO.

      Conclusion sentence: The antipsychotic is significantly more effective in preventing relapse than the placebo, 2 (1, N = 3195) = 364.32, p < .05.

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