Table 2.

Spectral diversity for three groups

Group	Distance to group centroid (diversity), mean ± SD	n
QMH	2.5 ± 1.1	7
DUW95	5.8 ± 2.1	10
DUW93	10.2 ± 7.2	8

P values for null hypotheses: (i) all three groups have the same mean diversity, Kruskal–Wallis P value = 0.002; (ii) mean QMH = mean DUW95, Mann–Whitney P value = 0.003; (iii) mean QMH = mean DUW93, Mann–Whitney P value = 0.001; and (iv) mean DUW93 = mean DUW95, Mann–Whitney P value = 0.2.