Figure 3
DendroScan screenshots displaying statistical test results. (a) Results of Levene tests (left) and t-tests (right) for natural ash sample “NATcp” tested versus experimental sample “U”. The left plot shows that Levene tests suggest homogeneous variances in 10 of the tested shape parameters. For the other 8 shape parameters, separate variance t-tests (“Welch tests”) were conducted. The right plot indicates no significant difference between “NATcp” and “U” for any of the 17 tested parameters. (b) DendroScan results for Levene-tests (left) and e-tests (right). The samples “NATcp” and “U” are verified to be statistically equivalent in all of the tested shape parameters. (c) In contrast, “F” and “V” show statistical equivalence for only 10 of the 17 shape parameters. Thus, these samples are still morphometrically distinguishable. The black line in the e-test plot represents the equivalence margin Dmax and is dependent on the standards used for calibration.
