Use the two-way frequency table. Do more students prefer apples or grapes? A. More students prefer apples because 32 students preferred apples, compared to 26 students who preferred grapes.
B. More students prefer apples because 3 students preferred apples, compared to 2 students who preferred grapes.
C. More students prefer apples because 75 students preferred apples, compared to 7 students who preferred grapes.
D. More students prefer apples because 29 students preferred apples, compared to 24 students who preferred grapes.
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Researchers are conducting experiments to determine the role of alcohol in the development of depression. after the study is complete, they determine that the relative risk of developing depression is 1.55 with a 95 % ci of 1.2 -1.9. each group is then divided into nonsmokers and smokers. the relative risk for the nonsmokers is 1.12 with a 95% ci of 0.87-1.37. the relative risk for the smokers is 1.7 with a 95 % cl of 1.5-1.9. what type of bias may affect this study? a. procedure bias b. recall bias c. selection bias d. confounding e. lead-time bias