Setting Up a Chi-Square Test for Homogeneity or Independence

AP Statistics· difficulty 2/5

Marginal distributions of two categorical variables tell us about each variable separately.

To check for an association, the most informative comparison is:

  • A

    Just the row totals

  • B

    Just the grand total

  • C

    Joint frequencies only

  • D

    Conditional distributions across rows or columns

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Explanation

Comparing conditional distributions reveals whether the response distribution depends on the explanatory category.

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