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81.
The hematopoietic activities of interleukin-1 总被引:3,自引:0,他引:3
82.
A. G. M. Steerneman E. A. van der Meulen W. Schaafsma G. N. van Vark 《Human Evolution》1993,8(1):25-31
Research on human evolution and sexual dimorphism motivates an interesting test problem. In studying hominid phylogeny it
is of interest to test whether parallel evolution plays a role. With regard to sexual dimorphism it is of interest to know
whether the directions of sexual dimorphism in the populations being compared are the same. We show that testing these two
problems gives rise to the same type of hypothesis testing, viz. the problem of testing the hypothesis that the means of independent,
normally distributed random vectors with unit covariance matrices are situated on a straight line through the origin. A test
is proposed and applied to study the sexual dimorphism of 20 recent skull populations. In this example the hypothesis of equal
directions of sexual dimorphism is rejected. The classical theory of constructing multiple discriminant functions (canonical
variates) is adapted to the problem of comparing sexual dimorphisms. 相似文献
83.
Using samples of skulls of early and modern hominids and modern pongids we compare the plausibility of Evolutionist and Creationist
viewpoints. Multivariate methods are used to assess the corollary of Creationism that all fossil specimens which Evolutionists
consider to be hominids are either apes or humans. We conclude that the results of this study cannot easily be accommodated
within a Creationist framework, and, therefore, contribute substantial evidence for the Evolutionist viewpoint. 相似文献
84.