%0 Journal Article
%T La repr¨¦sentativit¨¦ d un ¨¦chantillon et son test par le Khi-deux; Testing the representativeness of a sample
%A Louis Laurencelle
%J Tutorials in Quantitative Methods for Psychology
%D 2012
%I Universit¨¦ de Montr¨¦al
%X The value and credibility of a survey or opinion pool depend to a large extent on the observed sample s representativeness, which in turndepends on sample size. When dealing with an heterogenous population, however, sample size may be insufficient to counterbalance possible biases due to differences in constituent subpopulations. If population s composition is known, the sample s representativeness can be verified by a Chi-square test: the test is illustrated and a special formula is proposed and validated for the case of finite populations.
%K statistical tests
%K khi-square test
%U http://www.tqmp.org/Content/vol08-3/p173/p173.pdf