[amelia] imputing for highly skewed distributions

Hi Amelia folks, I have a question about imputing for highly skewed distributions. My data have missing test scores for 540 out of 709 observations in a lower-achieving subgroup and no missing scores for the other students (about 129,000 in size). The problem is that the subgroup has a highly left skewed distribution while the overall distribution is highly right skewed. I set priors by giving the mean (16.07 out of 40, versus 31.68 for the other students) and standard deviation (9.30 vs. 7.20) of the subgroup. But would it still be a problem that the subgroup distribution is highly left skewed (and so unlike the rest of the population)? Thanks a lot. All very best, Qian Guo - Amelia mailing list served by Harvard-MIT Data Center [Un]Subscribe/View Archive: http://lists.gking.harvard.edu/?info=amelia