Examples from the Web for quartile
Of course, that's just an illustration; people don't mechanically drop down a quartile by getting more education.
A 3rd quartile candidate with "some college"earning $1085 a week becomes a second-quartile BA holder earning . . . $1066.
First Quartile--Fairly clear; illumination of actual scene is fairly represented.Inquiries into Human Faculty and Its Development|Francis Galton