Statistical analysis of elliptic drawings (2): Log Velocity versus log Euclidian curvature, piecewise linear law (PLL) compared to the regular power law.

The PLL is: if , if ; the regular Power Law is , .
For each of the three eccentricities and three subjects the table presents the best and for the PLL and the best and for the regular power law, plus the ratios of the sums of square errors () for the two linear regressions for the different ellipses. Also presented are the probabilities that the PLL model is better than the power law model, computed according to the equation: where and is the number of trials.