While training theme park attractions a trainer needs to teach the position of Grouper. A Grouper's job is to take individuals and parties and place them on ride vehicles or in theaters in the most efficient way possible to minimize the wait time for those in line.
Most random number generators will choose numbers at random where if the max number if 10, one could get any one of those numbers. The Grouper Training App gives a weight or precedence to numbers that naturally and acurately come up statistically more often. This App gives higher weight to groups of 2-8 specifically 2,4,6.