Which metric is a common one when trying to determine whether a relationship between two variables is weak, moderate, or strong in strength? Weak: 0 to .50, Moderate: 50 to .75, Strong: 75 to 1. Weak: 1 to 33; Moderate: 33 to 66; Strong: 66 to 100. Weak: 0 to .20; Moderate: .20 to .50; Strong: .50 to 1 Weak: 0 to .30; Moderate: .30 to .60; Strong: .60 to 1