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RE: st: RE: bihistogram

From   "Nick Cox" <[email protected]>
To   <[email protected]>
Subject   RE: st: RE: bihistogram
Date   Wed, 27 Aug 2008 11:13:44 +0100

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

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. 

[email protected] 

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:

and this too:
net search pyramid

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