Question 14 On a multiple choice test with 15 questions, each question has four possible answers, one of which is correct. For students who guess at all answers, find the standard deviation of the number of correct answers. 1.5492 0.9682 2.8125 1.6771 None of the above

Question 15 On a multiple choice test with 15 questions, each question has four possible answers, one of which is correct. For students who guess at all answers, find the expected mean of the number of correct answers. 2.8125 11.25 60 3.75 None of the above

Question 16

If X has a binomial distribution with n = 4 and = 0.3, then P(X = 1) = ________ .

0.0756 0.6517 0.0837 0.4116 None of the above