13.24 Leg press uncorrelated with strength? The P-value of 0.17 in part a of the previous exercise suggests that LP200 plausibly had no effect on maxBP once BP60 is in the model. Yet when LP200 is the sole predictor of BP, the correlation is 0.58 and the significance test for its effect has a P-value of 0.000, suggesting very strong evidence of an effect. Explain why this is not a contradiction.