Unit 12 F.R #2A) Calculate the proportion of tobacco use in female subjects and in male subjects. Discuss your findings. (6 points) VIEW GRAPHB) Test the proportions for a significant difference in tobacco use between males and females. Let ? = .05. Show all work including statement of Ho (and so on). Discuss your findings. (12 points)C) A random sample of 262 leukemia cases shows that 150 are male and 112 are female. Therefore, the observed proportion of cases that are male = 150 / (150 + 112) = .5725. If there were no gender preference for this disease, we would expect 50% of cases to be male. Is the observed proportion significantly different from expected? Let ? = .05. Show all hypothesis testing steps, and interpret your results. (10 points)

2. A survey of tobacco use in high schools tested the saliva of female and male students for presence of tobacco byproducts. Three-hundred eighteen (318) randomly selected females participated in the study, as did 336 randomly selected males. Cross-tabulated data are shown in the table below. TABLE: Data from tobacco survey Tobacco + Tobacco - 39 2?9 26 310 a. Calculate the proportion of tobacco use in female subjects and in male subjects. Discuss your ndings. (6 points)