SOLUTION: In an industrial unit certain machines producing washers the probability of a item is 0.01. Calculate the mean and the standard deviation for the distribution of defective washers,

Question 654511: In an industrial unit certain machines producing washers the probability of a item is 0.01. Calculate the mean and the standard deviation for the distribution of defective washers,when the total number is 500.
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
In an industrial unit certain machines producing washers the probability of a defective washer is 0.01. Calculate the mean and the standard deviation for the distribution of defective washers,when the total number is 500.
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Binomial Distribution:
mean = np = 500*0.01 = 5
std = sqrt(npq) = sqrt(5*0.99) = 2.22
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Cheers,
Stan H.

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