Almost six months ago (!) I wrote a blog post about the NEISS data set, a sample of accidents reported to emergency rooms in the U.S. that are related to consumer products. Ever since I did that exploration, I have been wanting to ask a bit of a different question from that sample of accidents. How do the accidents that people suffer depend on their demographic characteristics? We can get a bit of a sense of that from looking at the plot with age on the x-axis (or exploring Hadley Wickham’s NEISS Shiny app) but the NEISS data set includes quite a bit more demographic information to …