SOLUTION: A die is rolled 18 times with the amount of times that 2 comes up tallied. If this experiment is repeated many times, what is the mean and the standard deviation for the random var
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Question 801862: A die is rolled 18 times with the amount of times that 2 comes up tallied. If this experiment is repeated many times, what is the mean and the standard deviation for the random variable X, the number of twos?
I know that n=18 and p=1/6.
P(X=2) Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! A die is rolled 18 times with the amount of times that 2 comes up tallied. If this experiment is repeated many times, what is the mean and the standard deviation for the random variable X, the number of twos?
I know that n=18 and p=1/6.
P(X=2)
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mean = np = 18*(1/6) = 3
std = sqrt(npq) = sqrt(3(5/6)) = sqrt(5/2) =1.5811
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Cheers,
Stan H.
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