Statistics and Probability · Hypothesis testing

Chi-squared tests

Checking whether observed category counts match an expected pattern, or whether two categorical variables are related.

Also known as: goodness of fit test, test of independence.

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• Hypothesis testing basics: Checking whether observed data is surprising enough to reject a specific default assumption, the null hypothesis.

Related topics

• ANOVA: Comparing the means of three or more groups at once without inflating the false-positive rate.