posted by Cath on .
. There is a strongly linear association between the weight of a football player and the time in seconds it takes for that player to run a 100-yard dash. Knowing this, a reasonable value for the correlation r between weight and 100-yard dash time would be
Assuming that heavier football players would run more slowly and predictability was not perfect, I might expect r = approx. -.50 to -.70.