## chi-squared testThe chi-squared test is a test of the closeness of an observed result to the expected result, and hence how closely a model corresponds to a particular sample of n members of a population. χ ^{2} is given by
where s^{2} is the observed sample variance and σ is the standard
deviation of the model. Values of χ ^{2} have been
tabulated for a range of values of n, and their distributions (chi-square
distributions with (n - 1) degrees
of freedom) derived in each case. ## Related category• PROBABILITY AND STATISTICS | |||||

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