[astrodust]

Differences in averages of 5-10% are pretty marginal when you consider the standard deviation on this sort of thing is going to be 50% or more.

You'd be better able to predict someone's physical size from their voice than anything else, but even then it's a guess. I've known very big people with unusually high-pitched voices, plus small women with surprisingly deep voices. It's all over the place.

[Mz]

And, yet, most of the time, most people can fairly readily infer gender based on voice alone.

I know it isn't politically correct to talk about any differences at all between ethnicities or even genders. The PC thing at the moment seems to be that "all such differences are social construct." So, it would probably be wise for me to just walk away here as a lot of people will assume I am a racist trying to justify racism. And this isn't some kind of hill I care to die on.