Comment by akerl_

Your original link makes fairly clear how disingenuous it is to call the figures a national average:

> Data from International IQ Test (IIT) are based on data from 1,352,763 participants worldwide who took the same IQ test on the website.

> Becker’s estimates are categorized by source. T = value is based upon actual test results from said country. E = value is a best-guess estimate based upon measured values of nearby countries.

Opening up the actual paper from Becker they're citing is basically a wandering tour where they try to find whatever numbers do exist and then math their way out of the fact that the sample sizes are small and the tests are different everywhere.

Various entities have performed IQ tests on people in many nations. But taking that and trying to flip it to say we've derived average national IQ is junk science.