In a study of treatments for very painful "cluster" headaches,
151
patients were treated with oxygen and
155
other patients were given a placebo consisting of ordinary air. Among the
151
patients in the oxygen treatment group,
123
were free from headaches 15 minutes after treatment. Among the
155
patients given the placebo,
25
were free from headaches 15 minutes after treatment. Use a
0.05
significance level to test the claim that the oxygen treatment is effective. Complete parts (a) through (c) below.
Extracted text: c. Based on the results, is the oxygen treatment effective? O A. The results suggest that the oxygen treatment is not effective in curing "cluster" headaches because the cure rates appear to be the same. O B. The results suggest that the oxygen treatment is not effective in curing "cluster" headaches because the cure rate for the oxygen treatment appears to be lower than that of the placebo. O C. The results suggest that the oxygen treatment is effective in curing "cluster" headaches. O D. The results are inconclusive.
P2 O D. Ho: P1
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Extracted text: In a study of treatments for very painful "cluster" headaches, 151 patients were treated with oxygen and 155 other patients were given a placebo consisting of ordinary air. Among the 151 patients in the oxygen treatment group, 123 were free from headaches 15 minutes after treatment. Among the 155 patients given the placebo, 25 were free from headaches 15 minutes after treatment. Use a 0.05 significance level to test the claim that the oxygen treatment is effective. Complete parts (a) through (c) below. a. Test the claim using a hypothesis test. 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? O A. Ho: P1 = P2 H1: P1 # P2 O B. Ho: P1 + P2 H1: P1 = P2 OC. Ho: P1 = P2 H1: P1 > P2 O D. Ho: P1 < p2="" of.="" ho:="" p1="" 2="" p2="" h1:="" p1="" #="" p2="" identify="" the="" test="" statistic="" (round="" to="" two="" decimal="" places="" as="" needed.)="" identify="" the="" p-value.="" p-value="(Round" to="" three="" decimal="" places="" as="" needed.)="" what="" is="" the="" conclusion="" based="" on="" the="" hypothesis="" test?="" the="" p-value="" is="" v="" the="" significance="" level="" of="" a="0.05," so="" v="" the="" null="" hypothesis.="" there="" v="" evidence="" to="" support="" the="" claim="" that="" the="" cure="" rate="" with="" oxygen="" treatment="" is="" higher="" than="" the="" cure="" rate="" for="" those="" given="" a="" placebo.="" b.="" test="" the="" claim="" by="" constructing="" an="" appropriate="" confidence="" interval.="" the="" 90%="" confidence="" interval="">< (p1="" -="">