Question 832320: J.D. Power and Associates says that 60 percent of car buyers now use the Internet for research and price comparisons.
1.Find the probability that in a sample of 5 car buyers, all 5 will use the Internet. Answer is .0778
2.Find the probability that in a sample of 5 car buyers, at least 2 will use the Internet.
3.Find the probability that in a sample of 5 car buyers, more than 1 will use the Internet
4.Find the mean and standard deviation of the probability distribution
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! J.D. Power and Associates says that 60 percent of car buyers now use the Internet for research and price comparisons.
1.Find the probability that in a sample of 5 car buyers, all 5 will use the Internet. Answer is .0778
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2.Find the probability that in a sample of 5 car buyers, at least 2 will use the Internet.
P(2<= x <=5) = 1 - P(0<= x <=1) = 1-binomcdf(5,0.6,1) = 0.9130
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3.Find the probability that in a sample of 5 car buyers, more than 1 will use the Internet
Ans: Same as answer to #2.
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4.Find the mean and standard deviation of the probability distribution
mean = np = 5*0.6 = 0.3
std = sqrt(npq) = sqrt(0.3*0.4) = 0.3464
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Cheers,
Stan H.
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