IQ or IQ or intelligence, " etc. (IQ) numeric with mean 100 and variance 15. Hence, in the standings and split the IQ, on average, about 70% of people have intelligence, average, etc. of 12% higher intelligence than the average, the 2% too clever and 1% people genius make up. The same process in the case of people with low IQ, mental retardation, and ... in the other direction is established.