Re: Kieren, thank you for avoiding profanity this time
"One thing I have learned to reject is the simple minded belief that individuals can be assessed by looking at a group and guessing."
You are quite correct in this. That's because individuals vary quite a lot, one to another.
However this does not stop you being able to look at groups and discerning that individuals in one group are more likely to display some traits rather than those in others. Your group assessment will be better than your individual assessment.
That's what statistics is all about; ask your scientifically inclined daughter. BTW she will also explain to you what's wrong with the phrase "science and genetics".