Originally posted by @fmf
As a matter of interest, are you a member of an ethnic group with what you say are "higher than average IQs" or are you a member of an ethnic group with "lower than average IQs"?
IQs for ethnic groups change radically over time a la Flynn effect. It is impossible to know what the average IQ for a group across the board is, and it is useless to speak of it as
the avearge IQ if it is clearly not established within a normal parameter.
For instance, the average IQ of an American white has increased substantially since the 1940s due to this effect. As we have reached pretty optimum levels of education for American whites in 2018, it is probably safe to say that the number we have now is reflective of the average IQ.
However, in India they still put up pretty abysmal scores for average IQ. This is because much fo the population did not experience mental stimulation or high rates of education enough to increase it.
For similar reasons, a Japanese person who has an IQ of 130 and is a software engineer might actually have a grandfather who has an IQ of 90 because he was a rice farmer that barely completed the fifth grade and is only semi-literate.