But what is the proportion of people with an IQ of 130 or more? We can calculate this, because we know that 95.44% of the population have IQs between 70 and 130. This leans only 4.56% of population, of which half (2.28%) will have an IQ of 130 or greater (the other half — also 2.28% — will, of course, have an IQ of 70 or less). So only 2.28% of the population will have an IQ of 130 or more.
But what is the proportion of people with an IQ of 130 or more? We can calculate this, because we know that 95.44% of the population have IQs between 70 and 130. This leans only 4.56% of population, of which half (2.28%) will have an IQ of 130 or greater (the other half — also 2.28% — will, of course, have an IQ of 70 or less). So only 2.28% of the population will have an IQ of 130 or more.