Fig. 3.

Mean Absolute Error (MAE - dimensionless) of $E_2$ against sample size for each fitting method. The plots show the mean across age of the mean absolute error of the estimates of percentile error ($E_2$) of the 1st percentile (left column) and 5th percentile (right column) curves for linear mean and constant variance ground truth (top row) and non-linear mean and non-constant variance ground truth (bottom row). Results for the 10th percentile were very similar to those for the 5th percentile and are shown in Supplementary Fig. S3.