Statistics Dictionary

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Chi-Square Statistic

Suppose we select a random sample from a normal population. The chi-square statistic can be computed using the following equation:

Χ2 = [ ( n - 1 ) * s2 ] / σ2

where n is the sample size, σ is the population standard deviation, s is the sample standard deviation equals, and Χ2 is the chi-square statistic.

See also:   Tutorial: Chi-Square Probability Distribution | Chi-Square Calculator