Wednesday, 26 September 2012

Population by age by sex

What is wrong with the above graph? In some ways, not too much, it's a very common way of presenting population by age by sex. But one of the most interesting datapoints that can be revealed by the graph is the ratio of genders in a particular age band. It is almost impossible for the human eye to discerd this as the bars are not next to each other. A more sensible approach is below. Why has such an efficient method become the standard?

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