Hi, I'm trying to use ad.test or ad2.test to test whether a given data set is exponential. I see that one of the function inputs is "distn", but I try "exponential" and 5 other variants, but I still get the error message: ad.test(test2, distn="exponential", fit=list(estimate = 0.167685), H=NA, sim=100) Error in ad.test(test2, distn = "exponential", fit = list(estimate 0.167685), : 'distn' must be a character string of a distribution function What should I enter for exponential? Also, do you know where I can get a list for the other distributions it can test? Thanks. eric [[alternative HTML version deleted]]