[R] adding the mean and standard deviation to boxplots
Bert Gunter
gunter.berton at gene.com
Mon Feb 4 17:46:10 CET 2008
"As for the standard deviation, are you sure you want this? Standard
deviation only makes sense if the data are normally distributed..."
--------------
-- This is false, of course. What you probably meant to say is something
like:
"The sample standard deviation may not tell you what you think it tells you
if the underlying data are not distributed something like a normal
distribution."
For what the true sd for sure tells you, see e.g. Chebycheff's Thm.
-- Bert Gunter
Genentech
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