Speaking of normal distributions and cancer clusters, does anybody (a) agree with me that the human race in general has a better "feel" for the normal distribution than the binomial distribution, and the Poisson is still worse - and (b) know of any experimental evidence for this?
That is, my conjecture is that if an untrained human thinks that there is an unusually large collection of tall people, or larger-than-usual apples, or whatever, in a collection, they are probably right; but there is a tendancy to expect more uniformity in Bernoulli and Poisson processes than should be there. People tend to see clusters of things and streaks of events when they are not really there. There is probably a reverse trend in the extreme tail; people probably overestimate the probability of getting (say) red fifty times in a row at Roulette simply because we don't have a good feel for really large and small numbers. -Robert Dawson ================================================================= Instructions for joining and leaving this list and remarks about the problem of INAPPROPRIATE MESSAGES are available at http://jse.stat.ncsu.edu/ =================================================================