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अक्षर - Akshar's avatar

I think people have poor understanding of nuances of statistical concepts like mean and they apply it like blunt tools. Kierkegaard is doing that here in my opinion based on how DDF has characterized his arguments.

Mean should always be interpreted in the light of other statistical properties of the variable. For example mean height of students in a school district has different signals than mean height of students in grade 5.

Nations are extremely diverse groups. India is a very large country and allegedly has one of the lowest average IQ. Yet, historically the nation has achieved a lot and its people are generally seen as pretty smart ones when they come as immigrants. Part of the reason is that it has a huge population so even if mean IQ is lower it likely has more individuals with IQ 130+ than say UK or Mexico.

But India is also ethnically very diverse. Which means different regions of India has drastically different average IQ levels than others. Bihar which has per capita income lower than nearly every sub saharan nation has 3rd highest IQ in India. Where as the richest and smallest state Goa is on number 5.

When it comes to immigration, IQ is a flawed measure. We need more average IQ plumbers than high IQ doctors. Benefits of 10 plumbers to society might be equivalent to benefits brought by 1 doctor.

But this plays out very differently when you consider groups. Let us say your prioritize immigration from nations with high mean IQ. Chances are that the poor people in UK (who might also have low IQ) will move to USA because the difference between being poor in UK and being poor in USA is pretty sharp. Where as a high IQ rich doctor working for NHS in UK might not find it worth moving to USA as being rich in London is same as being rich in SF. Reverse might be true for poor and lower mean IQ nations. A smart Nigerian or Indian might be more interested in moving to USA to make it big rather than an uneducated village bumpkin.

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