09-13-2017, 11:23 AM
I don't know how that website calculated their list, but graduation rate calculation is required and follows a prescribed formula per the Higher Education Act (HEA),
as amended (2008)
https://nces.ed.gov/pubs2017/2017046.pdf
as amended (2008)
https://nces.ed.gov/pubs2017/2017046.pdf