Flux ratios (top), residuals (centre), and -scores (bottom) for B/C (blue circles), Be/C (orange squares), and Li/C (green triangles). The models (top panel) are calculated for BIG (solid line), QUAINT (dash-dotted line), and SLIM (dotted line), from the best-fit transport parameters of the combined analysis of all three species. The residuals and -score are shown for SLIM only; the -score is related to the usual z-score by a rotation in a base where the covariance matrix of data systematics is diagonal (see text for details).