Comparison between the observed (crosses) and simulated (lines) cumulative distributions of the peak-to-peak RV amplitudes (top row), variability time scales (middle row) and χ² (bottom row). Lefthand panels vary the exponent π of the period distribution. Panels in the central column vary κ, the exponent of the mass-ratio distribution and the righthand panels vary η, the exponent of the eccentricity distribution. π, κ and η values are indicated in the upper-left legend of each panel. The bottom-right legends indicate the overall VFTS detection probability for the adopted parent distributions.