Here's a simple empirical relationship developed from 60 years of observation and first-person experience:

\(\overline{IQ}_{n} = \sum{IQ}_{n=1..6}/(n*\sqrt{n})\)

This was validated by my daughter last Sunday:

To what common human experience does \(\overline{IQ}_{n} \) apply?

Functional IQ of a group young men (16 to 22 years old) together, as in a car.