According to the American Diabetes Association. 8.3% of Americans have diabetes. Suppose that we randomly sampled 17 Americans. What is the probability that two of these people have diabetes? What is the mean number of people who would have diabetes in our sample of 17? What is the variance of the number of people who would have diabetes in our sample? Solution binompdf(17,0.083,2) = 0.2554 np = 17*0.083 = 1.411 np(1-p) = 17*0.083*0.917 = 1.29.