Pearson and Lee obtained the following results in a study of about 1,000 families:
Average height of husband ≈68 inches, SD≈2.7 inches
Average height of wife ≈63 inches, SD≈2.5 inches, r≈0.25
Predict the height of a wife when the height of her husband is
a) 72 inches
b) 64 inches
c) 68 inches
d) unknown