On 12 Jun 2000, at 16:04, Jorge Stolfi wrote: > > [Gabriel:] SD makes sense only if the distribution is normal... > > but coin tossing is not a gaussian process. > > There is a formula (Chebyshev's) that gives an X% confidence interval > for any distribution, given its mean and variance. Jim very kindly explained this in a private message. Yes, I was very wrong. Sorry about that. Cheers, Gabriel