80 Left Tail Two-Tall Right Tail samples = 300 mean = 0.676 70 sid. error = 0.094 60 50 40 es 30 20 10 0 0.40 0.50 0.60 0.70 0.80 0.90 null = 0.67 O p-value = 0.006 O p-value = 0.012 O p-value - 0.03 O p-value = 0.06