Posted by kati on Monday, June 13, 2011 at 2:58pm.
In a clinical trial of the drug Viagra, 117 patients reported headaches and 617 did not. What is the probability that a patient taking the drug will NOT experience headache symptoms?

statistics  Breezy, Monday, June 13, 2011 at 4:14pm
617/(617+117) = .840599 or 84.1%