Histogram of RV amplitudes K, where the distribution for all simulated planets is shown by the solid black line with uncertainties of (0.97N_P)^0.5. We show the outcome of the simulations comparable to our observations (uneven 34.3 observations per star) of Sect. 3.2, where the black dash-dotted line indicates the planet detections and the blue histogram the false positives with uncertainties of (0.91N_P)^0.5. The red curves indicate the distributions for detected planets for 20 (bottom), and 200 (top) observations per star, the red dash-dotted line for even 35 observations per star (see Sect. 3.3). Uncertainties for all the curves of detected planets are in the order of (0.98N_P)^0.5.