Even in your chart, the top 25% of janitors (the lowest IQ occupation) are smarter than the bottom 25% of college professors (the second highest IQ occupation). IQ ranges within an occupation are MUCH bigger than IQ ranges between occupations.
Even in your chart, the top 25% of janitors (the lowest IQ occupation) are smarter than the bottom 25% of college professors (the second highest IQ occupation). IQ ranges within an occupation are MUCH bigger than IQ ranges between occupations.