Total expected L_X/SFR distribution due to stochastic sampling of HMXBs XLF as a function of the sSFR. The rhombuses indicate the mean L_X/SFR per SFR-M_⋆ bin, colour-coded with the gas phase metallicity. The orange and magenta lines correspond to the upper and lower 99%, and 99.9% C.Is. of the HMXBs expected L_X/SFR, respectively. Grey dashed line depicts the upper 99.9% C.I of the total expected luminosity accounting for the stochasticity of both, LMXBs and HMXBs. We also overplot with a red line the L_X/SFR – sSFR L16 scaling relation, and its corresponding 1σ scatter.