Chi-Squared

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PAS

Cegep/2

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54 words

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1 minute

Measure of difference between observed and expected frequencies used in chi-squared test
Sym. $χ^{2}$

\begin{aligned} χ_{(n - 1) (m - 1)}^{2} & = \sum_{i, j} \frac{(o_{i j} - e_{i j})^{2}}{e_{i j}} \\ e_{i j} & = \frac{e_{i} e_{j}}{n} \\ d f & = (n - 1) (m - 1) \end{aligned}

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