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st: Definition of "outside" in box plots
Definining box plots.
The Tukey definition is
The box shows interquartile range (25-75) with median highlighted. Length
of whiskers are at 1.5* interquartile range
But sometimes in teaching medical professionals I see other definitions,
e.g. that whiskers are the 10th and 90th percentile.
I suggest that when box plot manuals are rewritten add the used definition.
I did not manage to find the definition in any Stata document on how the
"outside" limit definition is in a box plot. But I assume it is the
original Tukey (1.5), since the documentation mentions the Tukey paper as
Has anyone else experienced problems with varying understanding of the
definition of box plots ?
Consultant MD, ph.d. Associate professor
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