Thanks Jason. Here is a related reply, which I am forwarding to the list. -- John
From: [EMAIL PROTECTED] (Jim Jaccard) Newsgroups: comp.soft-sys.stat.spss
John -
One of the more common indices of variability used that is reasonably outlier resistant and that often is reported in conjunction with the median is called the Median Absolute Deviation statistic or MAD.
of course, the more symmetrical distributions are .. the more MAD is like AD ... average deviation ... finding average of absolute deviations around the MEAN
even if the median is a bit different than the mean ... MAD and AD are essentially the same quantities
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