“Type I” and “Type II” errors, names first given by Jerzy Neyman and Egon Pearson to describe rejecting a null hypothesis when it’s true and accepting one when it’s not, are too vague for stat newcomers (and in general). This is better. [via]
Type I and II errors simplified
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Mapping the Most Common Races
Select one or more races for a quick comparison. Counties are colored by the most prevalent.
Firearms Dealers vs. Burgers, Pizza, and Coffee
As of May 2016, there were 64,432 licensed firearms dealers and pawnbrokers, which got me wondering how that compares to other businesses.