Comparison between measured and predicted values for ν_max for stars in C11-19 (empty markers) and and C8+10 (filled markers), with measured values from the CV method. The two targets with black edges indicate the targets where only the SYD method returned detections. Top: a direct comparison, where the dashed line gives the 1:1 relation. The dotted vertical line indicated the Nyquist frequency of ~283 µHz for 30-min long-cadence data (also shown in the bottom panel). Bottom: relative differences between measured and predicted values against the measured values. Targets with a fractional difference above 160% have been moved to this value, as indicated by the dotted horizontal line. The full red line connects ten median-binned values across the ν_max range. To the right in this panel, we show a violin plot of the distribution, with the median indicated by the full black line and the spread indicated by the darker shaded interval. The marker type/colour indicates the number of methods for extracting seismic parameters that agree with a positive detection (see legend).