Two-way Contingency Table

Learn how to cross-tabulate two discrete variables.

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Two-way contingency table

To describe the relationship between two discrete variables, we always cross-tabulate them, generating a two-way contingency table and showing their marginal and joint distributions. This resembles the scatter plot and correlation coefficient between two continuous variables. A 2×22\times2 contingency table of two dichotomous variables is a cross-tabulation of two discrete variables, each with two levels, and a total of four cells of frequency counts.

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