What does the Intelligence Quotient (IQ) standard define as the average score?

The Intelligence Quotient (IQ) standard defines an average score of 100. This benchmark is established within a normal distribution framework, where the mean IQ score is set at 100, with most scores falling around this average. The IQ scale is designed so that the majority of the population scores within a specific range, typically between 85 and 115, which represents about 68% of the population when applying the empirical rule for a normal distribution. Therefore, identifying 100 as the average score indicates that it serves as the midpoint of this curve, allowing for standardized comparison across different individuals and groups.