LAUSR

4. The robust CV is a coefficient of variation (CV%) which allows for the variability in different samples to be compared. The high CV values (Figure 4) and scatter pattern (Figure 5) highlight the level of variation between and within the method groups used. Specimen 4 and Specimen 1 showed high variation with the values reported ranging from 2.17–8.20 and 1.53–4.65 S/CO respectively. The high robust CV% for the positive specimens demonstrate increased variability for the highly positive samples.