Pretty much, though I am considering making the scale 20 so it breaks down more like this (assuming the stats we are looking at are strength):

1: Morbidly weak
2-3: Has trouble standing up in a strong breeze
4-5: Visibly weak
6-7: Difficulty pushing objects that are their own weight
8-9: Difficulty lifting heavy objects for long periods of time
10-11: Can lift heavy objects for a short period and can stay standing for several hours without break
12-13: Can perform physical labor for half a day without a break
14-15: Visibly toned and can carry heavy objects with one arm
16-17: Muscular. Can break wooden objects with bare hands and raw strength
18-19: Heavily muscular. Can perform the work of several men with ease 
20: Pinnacle of strength

[@Yankee]