Question 545817: A nationwide survey of 17,000 college seniors by the University of Michigan revealed that almost 70% disapprove of daily pot smoking. If 18 of those seniors are selected at random and asked their opinion, what is the probability that more than 9 but fewer than 14 disapprove of smoking pot daily?
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! A nationwide survey of 17,000 college seniors by the University of Michigan revealed that almost 70% disapprove of daily pot smoking. If 18 of those seniors are selected at random and asked their opinion, what is the probability that more than 9 but fewer than 14 disapprove of smoking pot daily?
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Binomial Problem with n = 18 and p(pot) = 0.7
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P(10<= x <=13) = binomcdf(18,0.7,13)-binomcdf(18,0.7,9) = 0.6078
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Cheers,
Stan H.
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