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La représentativité d’un échantillon et son test par le Khi-deux; Testing the representativeness of a sample

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Doi: 10.20982/tqmp.08.3.p173

Laurencelle, Louis
173-181
Keywords: statistical tests , khi-square test
(no sample data)   (no appendix)

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.


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