IQ is a number meant to measure people cognitive abilities (intelligence) in relation to their age group. An I.Q between 90 and 110 is considered average; over 120, superior. Roughly 68% of the population has an IQ between 85 and 115.The average range between 70 and 130, and represents about 95% of the population.A score below 70 may indicate problems in understanding the iQ questions or soem type or retardation, and a score above 130 may indicate intellectual giftedness.1% of the population has an IQ of 136 or higher.oughly 68% of the population has an IQ between 85 and 115. The average range between 70 and 130, and represents about 95% of the population.