13-15 Good Human . A person with an attribute in this range will definitely have an advantage in this area over most people. By picking a profession or activity where this attribute is important, this person will have a reasonable chance of being successful at life. 16-18 Excellent Human . An 18 is the highest that one could normally expect to find in a human.
Humans can go higher, but they are very rare.
19-20 Max Human . Human maximum without supernatural influence. A 19 is for the best in the country, while 20s are world-record holders. 21-40 Monstrous . This is where you'd rate attributes that are beyond the human range, but not grossly beyond.