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RE: st: RE: bihistogram


From   "Rajesh Tharyan" <R.Tharyan@exeter.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   RE: st: RE: bihistogram
Date   Wed, 27 Aug 2008 12:16:34 +0100

Hi sorry about the post with no link. Not sure what happened

http://www.itl.nist.gov/div898/handbook/eda/section3/bihistog.htm

rajesh

-----Original Message-----
From: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Rajesh Tharyan
Sent: 27 August 2008 12:04
To: statalist@hsphsun2.harvard.edu
Subject: RE: st: RE: bihistogram

explanation of when it can be useful..

rajesh


-----Original Message-----
From: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Nick Cox
Sent: 27 August 2008 11:14
To: statalist@hsphsun2.harvard.edu
Subject: RE: st: RE: bihistogram

Conventionally population pyramids are side-by-side, bihistograms
(whether named as such or not) top-and-bottom, but it's the same basic
idea. 

The popularity and familiarity of population pyramids sometimes obscure
one simple question: how effective are they? In most cases the numbers
of males and females are within a few percent of each other, and so what
you see is an approximate pair of mirror images. Showing the sex ratio
directly as a function of age would seem to be better at showing more
subtle details, e.g. any cross-over point when sex ratio was 1. 

Nick 
n.j.cox@durham.ac.uk 

Sergiy Radyakin

What is the difference between bihistogram and a population pyramid?
Is it another way of drawing (horizontal vs vertical)? Or is it just
another term?

If so, this might be helpful:
http://www.ats.ucla.edu/stat/Stata/library/GraphExamples/code/twobar4.ht
m

and this too:
net search pyramid


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