Question 695896: In a recent survey 80% of the citizens in the community favored the building of a municipal golf course. If you ask 15 citizens about this project find the probability that
a. at least 9 favor the project
b. exactly 9 favor the project
c. less than 9 favor the project
I cannot remember how to calculate this formula or use minitab to calculate it for me. Can you help?
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! In a recent survey 80% of the citizens in the community favored the building of a municipal golf course. If you ask 15 citizens about this project find the probability that:
Binomial Problems with n = 15 ; p(favor) = 0.80
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I use a TI-84 calculator.
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a. at least 9 favor the project
P(9<= x <=15) = 1-P(0<= x <=8) = 1 - binomcdf(15,0.8,8) = 0.9819
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b. exactly 9 favor the project
P(x = 9) = binompdf(15,0.8,9) = 0.0430
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c. less than 9 favor the
P(0<= x <=8) = binomcdf(15,0.8,8) = 0.0181
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Cheers,
Stan H.
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