SOLUTION: A new drug has been found to be effective in treating 70% of the people afflicted by a certain disease. If the drug is administered to 900 people who have this disease, what are th

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Question 611668: A new drug has been found to be effective in treating 70% of the people afflicted by a certain disease. If the drug is administered to 900 people who have this disease, what are the mean and the standard deviation of the number of people for whom the drug can be expected to be effective? (Round your standard deviation to two decimal places.)

Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
A new drug has been found to be effective in treating 70% of the people afflicted by a certain disease. If the drug is administered to 900 people who have this disease, what are the mean and the standard deviation of the number of people for whom the drug can be expected to be effective? (Round your standard deviation to two decimal places.)
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mean = np*900*0.70 = 63
std = sqrt[npq] = sqrt(63*0.3) = 4.347
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Cheers,
Stan H.
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