Hi All - to compare dispersion between a number of different distributions with quite different average values, I was intending to use Coefficient of Variation. However only some of distributions are symmetric - some are skewed with long tails - is there a median equivalent to the Coefficient of Variation (sigma/mu) to deal with this asymmetry? Many thanks. Murray Doyle You may leave the list at any time by sending the command SIGNOFF allstat to [log in to unmask], leaving the subject line blank.