Ralph performs two correlation analyses in his classroom to see how student work ethic and student academic anxiety are related to test scores. He finds that work ethic is correlated with test scores (r = .86, p = .01) and academic anxiety is correlated with test scores (r = -.64, p = .02). Using these statistics, answer the following questions.

Which variable - work ethic OR academic anxiety - accounts for more the most variability in test scores? Justify your response by calculating and reporting the coefficient of determination for each relationship. Show your work below.