Well, there are issues here.
Not sure what a good or bad SAT score is? We have determined the average SAT scores by state to give you a better understanding of what's expected.
prepexpert.com
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The discrepancy in average SAT scores among the states is mostly due to differences in states’ educational budgets, which affect the quality of student education."
Also there are issues with who takes the test and who doesn't take the test. I'm finding statistics hard to come by, though it seems Washington DC has 100% participation (whatever that means).
Participation rate has a huge impact on state average SAT / ACT scores. In any state, the top students on the SAT/ACT are most eager to take it, and so states with low participation rates mechanically have higher SAT / ACT scores. Here, we use advanced statistical methods to control for...
blog.prepscholar.com
DC has 100% participation as does Delaware, and a lot of black kids. Iowa has 3%, North Dakota has 2%.
So we're seeing a manipulation of the statistics by states. Some states are trying to stop the lowest students from participating to bump up their scores.
So this isn't necessarily and issue of black students doing badly, but some states pushing kids to take it other others pushing them not to take it. This is clearly going to have an impact on the scores.
Again, I point to the UK where black African do BETTER than white kids, and Black Caribbean kids do WORSE. Is it about ethnicity? No, not directly.