The five dollar bill:motorcyclists killed correlation

October 2, 2015 11:00 AM

In 2007, the Fed printed 1.4 million real, physical $5 bills. And that year for every 270 Lincolns printed, one motorcyclist was killed in an automobile accident.

The alarming trend continues correlating annually at r=0.94. Is the Fed making a huge mistake? Is the recent upturn in $5 bill printing likely to result in more collateral damage for our two-wheeling friends? What could it all mean? (Perhaps that we should check our p-values and sample count before trusting a correlation, not matter how real the data is.)

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