"Actually the correlation of test results with economic status is rarely discussed in reports on US test results.Granted reports so far have been mostly bulletins just giving results, but if reporters are not going to make the effort to look into these other things they should omit the throwaway comments about the meaning of the results.ReplyDeleteAnonymousFebruary 10, 2013 at 2:35 PMMany ??rofess?" . . . .