I am doing a study on phylogeography. An average pairwise difference and Nei's distance matrix was generated in Arlequin. I am having a hard time interpreting the results. As far as I know, higher values would mean higher pairwise difference.
(1) What if I get a negative Nei's distance? (2) What do they mean by "corrected" average pairwise difference?
Hope someone could help. Thank you.