Answer all questions with explanation

High School Dropouts Approximately 10.7% of American high school students drop out of school before graduation. Assume the variable is binomial. Choose 12 students entering high school at random. Find these probabilities. Round Intermediate calculations and final answers to three decimal places. (a) No more than two drop out (b) All 12 stay In school and graduate (c) At least 11 graduate Part 1 of 3 (a) No more than two drop out P(no more than two drop out) = Part 2 of 3 (b) All 12 stay in school and graduate P(all 12 stay in school and graduate) = Part 3 of 3 (C) At least 11 graduate Plat least 11 graduate) =Alternate Sources of Fuel Ninety percent of Americans favor spending government money to develop alternative sources of fuel for automobiles. For a random sample of 130 Americans, find the mean, variance, and standard deviation for the number who favor government spending for alternative fuels. Round your answers to three decimal places. (a) Find the mean. (b) Find the variance and standard deviation. Part 1 of 2 (a) Find the mean. Mean: U = Part 2 of 2 (b) Find the variance and standard deviation. Variance. O- Standard deviation: 0 =Internet Purchases Thirty percent of adult Internet users have purchased products or services online For a random sample of 150 adult Internet users, find the mean, variance, and standard deviation for the number who have purchased goods or services online. Round your answers to at least one decimal place. Round your intermediate calculations to at least three decimal places. (a) Find the mean. (b) Find the variance and standard deviation. Part 1 of 2 (a) Find the mean. Mean: = OnF 1 Dage ard Part 2 of 2 (b) Find the variance and standard deviation. Variance: O Standard deviation: 0=