ISIS on the offensive in Iraq

[Fragony]

How large the difference in IQ has to be in order to notice a difference between people. Since this is the 7th time I've asked it, I'll just give the answer:

You need to move beyond one standard deviation to notice a slight difference between two people. 2 standard deviations is (easily) noticeable.

Now, a couple more questions for you:

1. How large is one standard deviation on the IQ scale in absolute numbers, assuming a 200 point scale with a 100 point average?

2. Lynn's map includes several countries with an IQ average of 70 or below. How many people in the world have an IQ of 70 and below?

EDIT: To make things easier, here's a picture you might find helpful:

Been a while since I used one of these baby's, I forgot how substitution works, so I just say that I can't answer it.

I would say we take the third generation who are on a level playing field, and see how they do (poorly).