basic

Chi-Square Test Statistic (4 categories)

Σ((O − E)² / E) for up to four categories.

Compute the χ² goodness-of-fit test statistic for up to four categories, given the observed counts and the expected counts in each. Reports degrees of freedom k − 1.

Daniel Oh By Daniel Oh
Published Last reviewed 1 min read

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Formula

χ² = Σ (O_i − E_i)² / E_i

In depth

Compute the χ² goodness-of-fit test statistic for up to four categories, given the observed counts and the expected counts in each. Reports degrees of freedom k − 1.