(1 point) Suppose a group of 1000 smokers (who all wanted togive up smoking) were randomly assigned to receive anantidepressant drug or a placebo for six weeks. Of the 184 patientswho received the antidepressant drug, 39 were not smoking one yearlater. Of the 816 patients who received the placebo, 167 were notsmoking one year later. Given the null hypothesisH0:(pdrug?pplacebo)=0 and the alternative hypothesisHa:(pdrug?pplacebo)?0, conduct a test to see if taking anantidepressant drug can help smokers stop smoking. Use ?=0.01,
(a) The test statistic is ____
(b) The P-value is____
(c) The final conclusion is
A. There is not sufficient evidence to determine whether theantidepressant drug had an effect on changing smoking habits afterone year.
B. There seems to be evidence that the patients taking theantidepressant drug have a different success rate of not smokingafter one year than the placebo group.
