In addition to all the standard arguments against IQ (tailor at specific culture circles, can be taught and improved upon, measures subset of intelligence) it i

In addition to all the standard arguments against IQ (tailor at specific culture circles, can be taught and improved upon, measures subset of intelligence) it is important to remember that this is a sample of people who took the test, which by and far may not be a representative sample of a population. Most probably it's upwardly biased, but one has no way of knowing if the bias is constant across countries, which in turn makes any inference impossible.