Cumulative distribution of the mass ratios measured for the SB2 and SB1 population, including bias-correction due to the finite binary detection probability (see text for details), defined in the bins 0.05, 0.15, …, 0.95 (each representing an interval of ∆q = 0.1). The distribution is compared to cumulative functions obtained for κ = −1,0,0.2, and 1, defined in the interval 0.0 < q ≤ 0.95, except for the κ = −1 case, which is defined for 0.05 ≤ q ≤ 0.95 to avoid a singularity. Evidently, the observed distribution closely follows a flat mass-ratio κ = 0 (uniform).