When running my analysis on a dataset, I find a positive Mantel-Haenszel chi square trend statistic. Does this mean that the trend in the data is positive or simply that there is a trend? The data deals with the improvement of patients' symptoms after taking a drug or a placebo.
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Large values of the statistic would be associated with trend either way (to see this yourself, reverse the ordering of your categories, and see that the statistic doesn't change) |
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