Considering IQ is measured as a population statistic with 100 set as the average 104-106 looks "interesting. And no you cant compare populations so easily since

Considering IQ is measured as a population statistic with 100 set as the average 104-106 looks "interesting. And no you cant compare populations so easily since most tests are not invariant across populations. See also: https://en.wikipedia.org/wiki/Rasch_model#Invariant_comparison_and_sufficiency https://en.wikipedia.org/wiki/Rasch_model#Invariant_comparis... Basically if you do not have a test in which harder and easier items are also harder and easier in both populations you have nothing to compare.