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Thread: Chi-square test of independence - post-hoc test for a r x c table

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    Smile Chi-square test of independence - post-hoc test for a r x c table




    Hi everyone,

    I have a question about chisq post-hoc tests. I'm analyzing a 4 x 7 contingency table. When running a chisq test of independence, I found significant differences between the 7 groups. Now I would like to run post-hoc tests to see where exactly those differences lie.

    If I want to run 2 x 2 's, does this mean I need to run 84 separate tests?? That seems like a lot ... and I also wouldn't know how to report it. The dataset is quite large, so there would be enough units in each cell if I did it this way. Am i doing this right?

    Any help would be appreciated! Thank you

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    Re: Chi-square test of independence - post-hoc test for a r x c table

    Look at each cell's contribution to the chi-square statistic (from the original table).

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    Re: Chi-square test of independence - post-hoc test for a r x c table


    Or you could compare all of the rows like you referenced. So depending on how you want to look at them, if could be 1 v 2; 1 v 3; 1 v 4; 2 v 3; 2 v 4; 3 v 4. But caution tells you to correct for multiple comparisons (repeated tests), which depending on your p-values can knock a couple above your cut-off alpha level.


    I am guessing Miner said to look at the residuals, which is also an option.
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