TABLE 1. SMA slopes and associated statistics for frill and other skull traits from Protoceratops andrewsi.

Measure Intercept Slope Slope CIs Test statistic P slope ≠ 1
Frill length -1.46 1.23 1.14-1.34 r = 0.719, 26df <0.0001
Frill width -1.21 1.29 1.19-1.41 r = 0.827, 18df <0.0001
Jugal Boss width -0561 1.15 0.983-1.34 r = 0.403, 18df 0.078
Orbit width 0.272 0.699 0.650-0.751 r = -0.877, 30df <0.0001
Orbit height -0.583 0.843 0.760-0.935 r = -0.526, 30df 0.002