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 130 randomly selected students on your campus and find that 72of them would prefer a boy. (a) Use the normal approximation to the binomial to approximate the probability that, in a random sample of 130 students, at least 72would prefer a boy, assuming the true percentage is 45%. (b) Does this result contradict the poll? Explain.
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 130 randomly selected students on your campus and find that 72of them would prefer a boy. (a) Use the normal approximation to the binomial to approximate the probability that, in a random sample of 130 students, at least 72would prefer a boy, assuming the true percentage is 45%. (b) Does this result contradict the poll? Explain.
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section: Chapter Questions
Problem 8CR
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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 130 randomly selected students on your campus and find that 72
of them would prefer a boy.
of them would prefer a boy.
(a) Use the normal approximation to the binomial to approximate the probability that, in a random sample of 130 students, at least 72
would prefer a boy, assuming the true percentage is 45%.
would prefer a boy, assuming the true percentage is 45%.
(b) Does this result contradict the poll? Explain.
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