Cаlculаting the Cоefficient оf Determinаtiоn (Validity Variance)A researcher develops a "Mechanical Reasoning" test to predict success in a technical training program. The correlation between the test scores and the final exam scores (the criterion) is r = .50. Problem: Calculate the Coefficient of Determination (r²) for this validity coefficient. Application: What percentage of the variance in training success is explained by the test scores, and what percentage remains unexplained?