The 2 variables on the USNews rankings do not correlate.(for example, BU has the lowest acceptance rate but is ranked 69th in student selectivity) I would think that if a school X has the lowest acceptance rate, then it should have the highest student selectivity b/c it has the highest # of applicants to choose from. Well, obviously my reasoning is wrong and I don't understand the differences bet. the 2. Can anyone explain this for me? Thanks!