Scores were obtained from a random sample of 95 government workers on measures of introversion (x1), depression (x2), patriotism (x3), IQ (x4), and conservatism (y). The sum of squares for the ŷ values was 16.55 and the sum of squares for y was 82.36. Therefore, ______.
R2 = 0.02
R2 = 0.20
R2 = 0.80
R2 = 0.35