Making major things easy, and minor things hard
The reckless practice of eyeballing trend lines

Making major things easy, revisited

In the prior post, I made a chart that shows the driver license status of British drivers at different ages. The key change unplugs the obsession with a+b+c = 100%. Instead, the revised chart makes it easier to figure out what proportion of which age group holds which type of license.

This is the right-side plot from the panel of two plots:

Junkcharts_redo_significanceolddrivers_male

Looking at this chart, one might think my primary point of interest is the relative proportion with full license vs no license. But on second thought, I'm less interested in this comparison than that between male and female drivers. Does the prevalence of full licenses differ between men and women as they age?

In the original panel, the reader has to run back and forth between the two plots. Why not put that comparison on a single plot?

Like this:

Junkcharts_redo_significanceolderdrivers_fulllicense

This chart surfaces the difference between men and women (at all age groups) in owning full driver's licenses. Women are much more likely to stop driving earlier.

Here is the entire panel:

Junkcharts_redo_significanceolderdrivers_bylicense

Because of this structural choice, it is harder on this panel to learn the distribution of license status.

 

 

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