[alokm]

You will have to use binomial distribution (http://en.wikipedia.org/wiki/Binomial_distribution) for finding the probability that 5% of them are wrong (Assuming researches are independent). I guess this probability will come to be very small. But the point of this article is not alpha(confidence level) ,It is the bias of the researcher.

[jforman]

p-values are calculated in many different ways, not always using the binomial distribution (of the p-values I've claimed, very few have used the binomial distribution)

[alokm]

i was referring to the chances of 5% of the papers giving wrong results. using pvalue as the chance of failure in each research paper , binomial can be used to find the probability that 5% of the papers are in correct