These results are not from any designed "test". They come from self-reported entries that people use to create their individual profile at a dating website (OKcupid). Ethnicity and Religion values are selected by drop-down menu, but the text that was evaluated came from the many free-form areas that people use to write descriptions about themselves.

A detraction from the generality of these results (and it's a big detraction) is the "self-sorting" that may have happened prior to anyone filling out any profile. What sort of people end up using an online dating website? Perhaps the well-educated fundemantalists of any group are so exclusive that they search for mates only amongst specialized social gatherings of their own group (Brigham Young University, Liberty University, Bob Jones University).