4. Statistical Infrequency frequency 70 100 130 IQ Scores Average IQ in the population is 100pts. The further from 100 you look, the fewer people you find
5. Statistical Infrequency frequency 70 100 130 IQ Scores A very small subset of the population (<2.2%) have an IQ below 70pts. Such people are statistically rare. We regard them as having abnormally low IQs