37. How to quit smoking It's hard for smokers to quit. Perhaps prescribing a drug to fight depression will work as well as the usual nicotine patch. Perhaps combining the patch and the drug will work better than either treatment alone. Here are data from a randomized, double-blind trial that compared four treatments. " A "success" means that the subject did not smoke for a year following the start of the study. Group Treatment Subjects Successes 1 Nicotine patch 244 40 2 Drug 244 74 Patch plus drug 245 87 Placebo 160 25 a. Summarize these data in a two-way table. b. Do the data provide convincing evidence of a difference in the effectiveness of the four treatments at the a = 0.05 significance level? 39. How to quit smoking Refer to Exercise 37. Which treatment seems to be most effective? Least effective? Justify your choices. 43. Finger length Is your index finger longer than your ring finger? Or is it the other way around? It isn't the same for everyone. To investigate if there is a relationship 96 between gender and relative finger length, we selected a random sample of 460 U.S. high school students who completed a survey. The two-way table shows the results. Gender Female Male Total Index longer 85 73 158 Relative finger length Same length 44 86 Ring longer 100 116 216 Total 227 233 460 Do these data provide convincing evidence at the o = 0.10 level of an association between gender and relative finger length in the population of students who completed the survey