<p>in barrons there is the following question (page 293): suppose that 70% of all dialysis patients will survive for at least 5 years. In a SRS of 100 new patients, what is the probability that the proportion surviving for at least 5 years will exceed 80%?</p>

<p>barrons calculates the single proportion standard deviation and then evaluates using ncdf. Can this be done using bcdf? I think it would make sense to do 1-bcdf(100, .7, 80), but I don't get the same answer. Can someone please explain this to me?</p>