PDFs for simulated WEAVE datasets of Draco. Left panel: PDFs for the 100 simulated WEAVE datasets of Draco (assumed binary fraction f = 0.6) obtained using the new methodology implemented in this work. In orange, we show the cases where the correct binary fraction is obtained within 1σ (69%); in brown within 2σ (21%, up to 90%) and in black those that predict it within 3σ (10%, up to a 100%). The vertical green line indicates the median of the maxima distribution. Right panel: one single PDF of the ones shown in the left panel, this is what we expect to obtain when analyzing the future observational data. Vertical lines indicate the median and intervals of confidence of 1σ, 2σ, and 3σ, as indicated in the labels.