See answer: Testing Claims About Proportions. In Exercises 718, test the given claim

Chapter 9, Problem 15

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Testing Claims About Proportions. In Exercises 718, test the given claim. Identify the null hypothesis, alternative hypothesis, test statistic, Pvalue or critical value(s), conclusion about the null hypothesis, and final conclusion that addresses the original claim.Headache Treatment In a study of treatments for very painful cluster headaches, 150 patients were treated with oxygen and 148 other patientswere given a placebo consisting of ordinary air. Among the 150 patients in the oxygen treatment group, 116 were free from headaches 15 minutes aftertreatment. Among the 148 patients given the placebo, 29 were free from headaches 15 minutes after treatment (based on data from HighFlowOxygen for Treatment of Cluster Headache, by Cohen, Burns, and Goadsby, Journal of the American Medical Association, Vol. 302, No. 22). We wantto use a 0.01 significance level to test the claim that the oxygen treatment is effective.a. Test the claim using a hypothesis test.b. Test the claim by constructing an appropriate confidence interval.c. Based on the results, is the oxygen treatment effective?