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# Point) Suppose a group of 700 smokers (who all wanted to give up smoking) were randomly assigned to receive an antidepressant drug or a placebo for six weeks. Of th...

## Question

###### Point) Suppose a group of 700 smokers (who all wanted to give up smoking) were randomly assigned to receive an antidepressant drug or a placebo for six weeks. Of the 555 patients who received the antidepressant drug; 36 were not smoking one year later: Of the 145 patients who received the placebo, 47 were not smoking one year later: Test the null hypothesis Ho (p1 pz ) = 0 against the alternative hypothesis Ha (P1 p2) # 0. Use & = 0.01 The rejection region is Izl (b) The test statistic is z

point) Suppose a group of 700 smokers (who all wanted to give up smoking) were randomly assigned to receive an antidepressant drug or a placebo for six weeks. Of the 555 patients who received the antidepressant drug; 36 were not smoking one year later: Of the 145 patients who received the placebo, 47 were not smoking one year later: Test the null hypothesis Ho (p1 pz ) = 0 against the alternative hypothesis Ha (P1 p2) # 0. Use & = 0.01 The rejection region is Izl (b) The test statistic is z = The final conclustion is A. We can reject the null hypothesis that (p1 pz) = 0 and accept that (p1 ~ p2) # 0. B. There is not sufficient evidence to reject the null hypothesis that (p1 pz) = 0.

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