Question 231555: "J.D power and associates says that 60 percent of car buyers now use the internet
for research and price comparisons.
Find the probability in a sample of 8 car buyers that:(A) all 8 use the internet (B) at least 5 will use the internet (C) more than 4 will use the internet (D)2 or more will use the internet (E) The expected number of car buyers who will use the internet (F) The Standard deviation of the buyers who will use the internet"
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.
Find the probability in a sample of 8 car buyers that:
(A) all 8 use the internet
Ans: 0.6^8
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(B) at least 5 will use the internet
Ans: 1 - binomcdf(8,0.6,4)
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(C) more than 4 will use the internet
Ans: same as (B)
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(D)2 or more will use the internet
Ans: 1 - binomcdf(8,0.6,1)
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(E) The expected number of car buyers who will use the internet
Ans: np = 8*0.6 = 0.48
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(F) The Standard deviation of the buyers who will use the internet"
Ans: sqrt(npq) = sqrt(0.48*0.4) = 1.3856
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Cheers,
Stan H.
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