PROBLEM 1: if instead of sampling 5, I sample a 1000, then the probability of observing 3:5 dead RPs and 2to OK RPs (under H0) is: ${1000 \choose 600} (3/5)^{600} (1-3/5)^{400} = 0.026$....!!! This -too- is statistically significant? But how can it be, it's just the null hypothesis itself, except for observing a larger sample.