1 (Points : 10 ) Problem 1 (a )One of the most promising approaches to helping people to quit smoking is the nicotine patch . The patch gradually dispenses nicotine into the blood . In a 1994 experiment at the Mayo Clinic in Minnesota , 240 volunteer smokers participated in a study of the effectiveness of the nicotine patch . All of the volunteers were between the ages of 20 and 30 , were in good health , smoked at least 20 cigarettes a day and wanted to quit . They were randomly assigned to receive either 22-mg nicotine patches or placebo patches . All 240 participants also received counseling about quitting smoking . After one year , 33 of the 120 participants with the nicotine patch had quit smoking while 17 of those with the placebo patch had quit .What are the explanatory and response variables in this case ?The response variable is whether they quit smoking or not . The explanatory variables are the use (or otherwise ) of a nicotine patch ,and the counseling they received .2 (Points : 10 ) Problem 1 (b )One of the most promising approaches to helping people to quit smoking is the nicotine patch . The patch gradually dispenses nicotine into the blood . In a 1994 experiment at the Mayo Clinic in Minnesota , 240 volunteer smokers participated in a study of the effectiveness of the nicotine patch . All of the volunteers were between the ages of 20 and 30 , were in good health , smoked at least 20 cigarettes a day and wanted to quit . They were randomly assigned…