Results of the bootstrap analyses on the stars HD 215152, HD 192310, and CoRoT-7. Top panels: comparison between the standard errors from the bootstrap analysis of the estimated RVs, FWHM, and asymmetry parameters using the SN fit and the common strategy (Normal fit and BIS SPAN). Bottom panels: ratio between the standard errors estimated on the parameters derived from the common strategy and the corresponding standard errors estimated on the parameters derived from the SN fit. When using SN mean RV (black circles), the standard errors are on average 60% larger than the standard errors of N mean RV (red triangles). However, the standard errors for SN median RV (cyan pluses) are on average 10% smaller than the standard errors coming from the N mean RV. The use of the asymmetry SN parameter γ leads to standard errors on average 15% smaller than the standard errors related to the BIS SPAN. We note that for asymmetry, the error in BIS SPAN is in m s⁻¹. To be able tocompare the errors in γ and BIS SPAN, we multiplied the error in γ by the slope of the correlation between γ and BIS SPAN.