[Clemenza]

The counties that show the largest percentages of African Americans are also the counties with the largest populations in the two states in question.

[FreedomCalls]

I'd have to do an Excel spread sheet to see exactly what the correlation is, but it is most certainly a positive number. It is not flat.

Note that I'm not agreeing with the results of the study -- I'm saying the methodology of the study is faulty.