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'Silva Braz V, Ubelaker DH, Foran DR, 2006: Morphological Analysis of Differential Bone Survival. Anthropologie (Brno) 44, 2: 173-177'. |
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| Abstract | | The correlation between the preservation of entire skeletons and fragments from their ribs (N=63) and femurs (N=38) within a historic sample (1833-1861) from the Voegtly cemetery, Pennsylvania, USA was calculated using the Wilcoxon signed-rank test (WSRT), which considers information about both the sign and the magnitude of the differences between pairs. If the two variables are similarly distributed, the number of positive and negative differences does not differ significantly. Although no particular distributions are assumed for the two variables, the population distribution of the paired differences was assumed to be symmetric. Bone fractures and the presence of plant roots and root markings were also considered. The Z score for femurs (-2.579) and ribs (-2.391), according to positive ranks (fragment < skeleton) revealed that in both cases the fragments display better preservation than that of the whole skeleton, despite variation in such relevant features as bone density and morphology. | | | | Keywords | | Taphonomy - Bone weathering - Voegtly, Pennsylvania (USA) | | |
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