why don't you try taking the log before imputation.
Gary
On Wed, 2 Apr 2008, Qian Guo wrote:
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
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