Maximum radial mode amplitudes for the LRGs (red circles) as a function of the corresponding radial mode frequency ν_Amax in a log–log scale, with 68% Bayesian credible intervals overlaid. Included, the amplitude measurements by Huber et al. (2011) for the same stars (filled green triangles), with their 1σ error bars, reported as a function of their ν_max values. The corresponding amplitude predictions for the measurements by Huber et al. (2011), computed from the best scaling relation model found by Corsaro et al. (2013), are also included for comparison (open green triangles).