Dear all, Is there a method available of comparing the output of the layers in a 3 way contigency table. Specifically I wish to test if an association present between a pair of categories in one layer is present in another, and their relative strength. Layers are not of equal sample size.
I have a hunch that the easiest way of doing this is to compare the ratio observed/expected between layers. But is there a rigorous method of comparing such ratios? A real world example: Each case in my data is an scientific article concerning marine turtles, categorised by species involved, field of research and nationality of author. I know that ignoring nationality there is a strong positive association between research on green turtles and resarch on pathology. Is this association independant of nationality? Thankyou in advance for any help. Steve . . ================================================================= Instructions for joining and leaving this list, remarks about the problem of INAPPROPRIATE MESSAGES, and archives are available at: . http://jse.stat.ncsu.edu/ . =================================================================
