This test: 11 point(s) Test: Chapter 7 Post-Test

Test: 7 Post-Test Question 2 of 11 This test: 11 pont(s) possible This question: 1 point(s) possible Resume later Submit test In a recent poll, 45% of survey respondents said that, if they only had one child, they would prefer the child to be a boy. Suppose you conducted a survey of 170 randomly selected students on your campus and find that 77 of them would prefer a boy. (a) Use the normal approximation to the binomial to approximate the probability that, in a random sample of 170 students, at least 77 would prefer a boy, assuming the true percentage is 46%. (b) Does this result contradict the poll? Explain. (a) The probability that at least 77 students would prefer a boy is (Round to four decimal places as needed.) (b) Does the result from part (a) contradict the poll? Yes, because the probability from part (a) is less than 0.05. Therefore, the survey results are unusual. No, because the probability from part (a) is less than 0.06. Therefore, the survey results are not unusual. Yes, because the probability from part (a) is greater than 0.06. Therefore, the survey results are unusual. No, because the probability from part (a) is greater than 0.05. Therefore, the survey results are not unusual.