There is a problem with that, though, because all you're doing is looking at race. The majority of black people are A, the majority of mexicans are B, the majority of whites are C, etc. based, from your description, only on their ethnicity. That system doesn't address the other issues that may be causing a particular pattern or behavior, and treats it as an inherent part of their cultural make-up.
For ten years I worked in property management and we had rental units across every level of the economic scale. And, yes, I will absolutely agree with you that there were often certain trends that you could see when running someone's credit application. However,I never took those trends as a sign of the biological nature of ______ people, but rather as a symptom of the various societal and governmental practices and policies in and around communities of color.