SOLUTION: In testing a new drug, researchers found that 20% of all patients using it will have a mild side effect. A random sample of 25 patients using the drug is selected. Find the mean

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: In testing a new drug, researchers found that 20% of all patients using it will have a mild side effect. A random sample of 25 patients using the drug is selected. Find the mean       Log On


   

Question 1076766: In testing a new drug, researchers found that 20% of all patients using it will have a mild side effect. A random sample of 25 patients using the drug is selected. Find the mean and standard deviation of patients having a mild side effect.
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
Mean is np=25*0.20=5
variance is np(1-p)=5*0.80=4
sd is square root of variance or 2.