Fig. 4From: Modeling of atrophy size trajectories: variable transformation, prediction and age-of-onset estimationDistribution of residuals. Residual diagnostics for Model (6) with transformation parameter λ=1 (left column) and optimal transformation parameter λ=0.45 (right column). Note that λ=1 corresponds to a model with untransformed response. Panels A and B present normal quantile-quantile plots of the estimated residuals that were obtained from fitting Model (6) to the analysis data set. Panels C and D contain plots of estimated residuals vs. fitted values (fitted values include random effect terms)Back to article page