Sexual Dimorphism, MI Index, Student's t and Snedecor's F - Ipiña - 2001

An index of sexual dimorphism for populations distributed as mixture models of two normal components has been proposed by the authors. Our proposal is a function of the five parameters characterizing the mixture model, that is, two mathematical expectations, two variances and one mixing proportion. That our index depends on a proportion is not always perceived correctly, so in this article we show that sample sizes, or proportions as lineal functions of sample sizes, influence on such common sample statistics as Student's t or Snedecor's F and the decisions that are made through them.

Keywords

MI Index - Proportions - Sample Statistics

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