Abstract
More than 13,000 secondary school students were given the seven tests reported in the AAHPER Youth Fitness Test Manual to determine the value of age, height, and weight as a classification device. An IBM Type 650 Magnetic Drum Data Processing Machine was used to calculate simple correlations, multiple correlations, and regression coefficients for the ten variables of age, height, and weight and the seven tests for each of the four groups of senior high school girls, junior high school girls, senior high school boys, and junior high school boys. In general, age, height, and weight have negligible value for classification purposes in all four groups. This study indicates that if classification indexes are used, they should be calculated for the specific selected events.