Question 947107: a nationwide survey of college seniors by the university of michigan revealed that almost 70% disapprove of daily pot smoking, according to a report in parade. if 12 seniors are selected at random and asked their opinion, find the probability that the number who disapprove of smoking pot daily: a. anywhere from 7 to 9, b. at most 5, c. not less than 8
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! a nationwide survey of college seniors by the university of michigan revealed that almost 70% disapprove of daily pot smoking, according to a report in parade. if 12 seniors are selected at random and asked their opinion, find the probability that the number who disapprove of smoking pot daily:
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Binomial Problem with n = 12 and p(disapprove) = 0.7
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a. P(7 to 9) = binomcdf(12,0.7,9)-binomcdf(12,0.7,6) = 0.6293
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b. P(0<= x <= 5) = binomcdf(12,0.7,5) = 0.0386
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c. P(not less than 8) = P(8<= x <=12) = 1 - binomcdf(12,0.7,7) = 0.7240
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Cheers,
Stan H.
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