It could be generally said that these people are those who have completed certain levels of education. (wisegeek.com)
While no accent guarantees education or lack of it, certain accents do correlate with certain levels of education, just as certain clothing does. (religion.blogs.cnn.com)
«There is a real clear connection between segregation — which in California almost always means double segregation by race and ethnicity as well by social class — and the probability that you will achieve certain levels of education attainment,» he said. (edsource.org)