I found that interesting. Continuing to read the article from Fox News,article I realized why:
Not surprisingly, those who said they attended worship at least once a week and considered religion important in their lives often performed better on the overall survey. However, level of education was the best predictor of religious knowledge.
It reminded me of the passage in 2 Nephi 9:28-29,
28 O that cunning plan of the evil one! O the vainness, and the frailties, and the foolishness of men! When they are learned they think they are wise, and they hearken not unto the counsel of God, for they set it aside, supposing they know of themselves, wherefore, their wisdom is foolishness and it profiteth them not. And they shall perish.
29 But to be learned is good if they hearken unto the counsels of God.
So the highly educated tend to scorn God and his counsels, but they score very high on these sorts of surveys.
One more quote from the article:
On questions about Christianity, Mormons scored the highest, with an average of about eight correct answers out of 12...