SOLUTION: A new drug has been found to be effective in treating 75% of the people afflicted by a certain disease. If the drug is administered to 400 people who have this disease, what are th
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Question 1118736: A new drug has been found to be effective in treating 75% of the people afflicted by a certain disease. If the drug is administered to 400 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.)
mean people
standard deviation people
Answer by addingup(3677) (Show Source): You can put this solution on YOUR website!
So you are looking at a binomial distribution with n=400 and p=0.75
Mean: μ = np = 400*0.75 = 300
Standard Deviation: σ = √npq = √400*0.75*0.25 = 8.66
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