Select one answer Quit Smoking: Previous studies suggest that use of nicotine-re

Question

Select one answer Quit Smoking: Previous studies suggest that use of nicotine-replacement therapies and antidepressants can help people stop smoking. The New England Journal of Medicine published the results of a double-blind, placebo- controlled experiment to study the effect of nicotine patches and the antidepressant bupropion on quitting smoking. The target for quitting smoking was the 8th day of the experiment. In this experiment researchers randomly assigned smokers to treatments.http://www.nejm.org/doi/full/10.1056/NEJM19990304340o903 10 poimts Of the 160 smokers taking a placebo, 25 stopped smoking by the 8th day. Of the 244 smokers using the nicotine patches, 40 stopped smoking by the 8th day. Are nicotine patches an effective treatment for helping smokers quit? Test the following hypotheses =0, Ha:p1-p2 where P, = the proportion of the nicotine patch treatment group who quit smoking and p2-the proportion of the placebo group who quit smoking where p1= the proportion of the nicotine patch treatment group who quit smoking. Which of the following conclusions is valid? A. O This experiment suggests that there is no significant treatment effect. Nicotine patches B. O We fail to reject the null hypothesis (P-0.58). Nicotine patches produce the same "quit C. O We reject the null hypothesis (P-0.58)·Nicotine patches have a significantly higher did not produce significantly higher "quit smoking" rates compared to a placebo. (P-0.42) smoking" rate as a placebo success rate than a placebo

Explanation / Answer

we fail to reject the null hypothesis p=0.58 nictine patches produce the same quit smoking rate as aa placebo'

option b

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