The range of ability scores in the general population is 6 to 15 for the 3d6 abilities, and 8 to 20 for the 4d6 abilities/attributes. This gives you an idea of how horrible and great your 3d6 and 4d6 scores are. Without even having any powers or weaknesses, your abilities may be beyond human norms.
3d6 Score Description 4d6 Score
1-2 inhumanly low 1-3
3 partially handicapped 4
4 horrible 5-6
5-6 very low 7-8
7-8 low 9-10
9 low average 11-12
10-11 average 13-15
12-13 good 16-18
14-15 very good 19-20
16-18 specially trained, outstanding 21-24
19-20 the best 25-28