medium low and high stand for sublevels, the values are rounded so:
med low is like 5.1 med medium would could be something like 5.5 and medium high can be anything close to 6
Not sure if its:
4-4.33 = inept (low)
4.33-4.67 = inept (med )
4.67-4.99= inept (high)
but something like that (anyone know exactly?)