Hmm, interesting thread. I consider 10-11 to be average, and 18 is the maximum score for a human. Using those rules, I'll probably get these:
STR 11 (Most people with jobs that require strength are probably stronger than I am. But I'm in the highest range of the office people)
CON 15 (I'm not doing professional sports, but I have no problem swimming some kilometers or suchlike. Regular training, too, I don't easily get sick, and external injuries tend to heal fast)
DEX 8 (Manual dexterity is slightly above average, but I have always been abysmal at sports that require agility and coordination)
INT 14 (I have a knack for complicated problems, and easily understand most concepts presented to me, even in areas I don't have regular contact with, but I've been too lazy to make more of it. Extreme stuff still escapes me - I could probably understand it with time and effort, but the real pros are noticably faster)
WIS 16 (I'm excellent at mediating conflicts (but I don't like to do it), and understand most people's feelings, motivations and viewpoints regardless of whether or not I share them, even, with effort, in extreme cases. I tend to be calmly independent and do not easily judge. I think I would make a good profiler. My main weakess is that I'm easily unbalanced by small, "unnecessary" things going wrong)
CHA 9 (Pff...very hard to say. I'm average looking and I'm not overweight, ugly or smelly. Still, people tend to keep away from me until they come to know me better. On the other side, I have been on the stage a few times and was reasonably successful for a non-professional. The result is probably still less than average.)