A reader commented in the "Fundamentalists and delinquency" post that belief in the inerrancy of the Bible is an upper-class phenomenon.
GSS participants were asked: "Which of these statements comes closest to describing your feelings about the Bible? 1. The Bible is the actual word of God and is to be taken literally, word for word. 2. The Bible is the inspired word of God but not everything in it should be taken literally, word for word. 3. The Bible is an ancient book of fables, legends, history, and moral precepts recorded by men."
Here are mean levels of education by answer for whites (sample size = 19,324):
Word of God 12.01
Inspired word 13.71
Book of fables 14.33
At the 95 percent confidence level, the Inspired Word group is significantly more educated than the Word of God group, and the Book of Fables group is more educated than both of them.