@chrissiejade wrote: It's for a class where I am asked to do this so I don't really have another choice unfortunately. I need to compare quartile information for serum levels with a categorical measure of diabetes.
Well, that's a shame, that a class assignment is forcing you to perform a sub-optimal and weak analysis. Maybe you could strive for "extra credit" by doing it both ways, using the ranks, and then using the continuous SerumLvl values.
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