All,
I used hotelling to compare some before and after data from patients who
underwent a surgical procedure. First I made a difference score for each
measure, and then tested whether the vector of mean difference scores was
equal to a vector of zeros.
The Hotelling T-squared procedure dropped 18 of the 28 variables "due to
collininearity." I don't know how to interpret collininearity in this
context.
Any information is appreciated.
Thanks,
JIm Seward
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