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Null and alternative hypotheses for the hypothesis? test

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Reference no: EM132399923

In a study of treatments for very painful? "cluster" headaches, 143 patients were treated with oxygen and 142 other patients were given a placebo consisting of ordinary air. Among the 143 patients in the oxygen treatment? group, 114 were free from headaches 15 minutes after treatment. Among the 142 patients given the? placebo, 37 were free from headaches 15 minutes after treatment. Use a 0.05 significance level to test the claim that the oxygen treatment is effective. Consider the first sample to be the sample of patients treated with oxygen and the second sample to be the sample of patients given a placebo. What are the null and alternative hypotheses for the hypothesis? test?

Reference no: EM132399923

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