You don't need to be a genius to understand that you can not describe a populations look based on how 20 people in that country look like.
You've mislead yourself with what you should be looking at and how to properly interpret the information available to you.
No rational person believes that a sampling of merely 20 people out of 40,000,000 gives a fair average.
I agree but where did you get the number 40 million from? I'd be surprised if there were that many Polish men in Europe to be honest.
People, people, I implore you be rational for one moment of your lives:
I did not suggest that the sampling of 20 people offers a national average of 40 million men in Poland mainly because there are not 40 million men in Poland.
I did not suggest that the sample in question represents 40 million people of Polish identity as that would likely result in some transvestite average Pole- odd not average.
I did not suggest the sample in question did anything but give an average of the people selected.
I have every reason to suspect 20 Polish men were chosen and from those 20 participants an average of their collective faces has been arrived at. I didn't read anything more into it than that because there is nothing more to it than that. Nonetheless we can still note differences among different nationalities. Why is this hard for people to grasp?
it is they way people carry themselves, move, talk etc that show any real difference.
What defines a "real" difference?