Comparison of the observed and simulated populations for the low-mass WD binary fraction of 7.5%. Top panel: the distribution of η (black) along with the best-fit model (red). The grayed-out region corresponds to η < 3, and the dashed lines correspond to the η distribution due to normally distributed RV errors with no binaries. The model agrees well with the data, despite the best fit being calculated using the ﹩{\rm{\Delta }}{{\rm{RV}}}_{{\rm{\max }}}﹩ distribution. Bottom panel: ﹩{\rm{\Delta }}{{\rm{RV}}}_{{\rm{\max }}}﹩ distribution (black) along with the best-fit model (red) for WDs with η > 3. The grayed-out region corresponds to ﹩{\rm{\Delta }}{{\rm{RV}}}_{{\rm{\max }}}\lt 100﹩ km s⁻¹ and is not included in the fit, and the dashed lines correspond to the ﹩{\rm{\Delta }}{{\rm{RV}}}_{{\rm{\max }}}﹩ distribution due to normally distributed RV errors with no binaries. We find good agreement between the observed distribution and the model, even for data points not included in the fit.