Flutterby™! : Record childlessness

record number of women childless, according to the Census Bureau. Sounds like they need to find some better ways to slice their samples, though:

Non-high school graduates and those with bachelor's degrees were most likely to be childless. Also women with higher incomes had the highest childless rates, in part a reflection of the increased professional options available to them, said David Popenoe, co-director of the National Marriage Project, a research group at Rutgers University.

So does this imply a correlation of "non-high school graduates" and "those with bachelor's degrees" with "women with higher incomes"?