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re: st: Boxplot with median *and* mean not possible?


From   David Airey <david.airey@vanderbilt.edu>
To   statalist@hsphsun2.harvard.edu
Subject   re: st: Boxplot with median *and* mean not possible?
Date   Thu, 5 Jun 2003 09:59:07 -0500

In Data Desk, the shaded intervals in boxplots for comparing medians are placed symmetrically around the median at

median +/- 1.58(high hinge - low hinge)/(n)^0.5,

A complete discussion of boxplots and the derivation of the shaded region is found in Chapter 3 in Velleman and Hoaglin (1981) Applications, Basics, and Computing of Exploratory Data Analysis. Boston: Duxbury Press.

-Dave

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