SOLUTION: A physician claims to have discovered a cure for a disease. Historically half of the patients with this disease have recovered without treatment. He treats 200 patients, 120 of who

Question 251215: A physician claims to have discovered a cure for a disease. Historically half of the patients with this disease have recovered without treatment. He treats 200 patients, 120 of whom recover. Waht is the probability that all 120 would have recovered without treatment?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
A physician claims to have discovered a cure for a disease. Historically half of the patients with this disease have recovered without treatment. He treats 200 patients, 120 of whom recover. What is the probability that all 120 would have recovered without treatment?
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Population proportion = 0.5
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The problem is binomial with n= 200, p = 0.5, x = 120
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P(x=120) = binompdf(200,0.5,120) = 0.001
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Cheers,
Stan H.
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