Hi
I have encountered an error while I was trying to obtain ROC curve in
logistic regression analysis in spss. could you please help me??
the error was this:
*Warnings
Either or both of the positive and negative actual state groups have no
valid observations. Estimation cannot be performed, and the ROC curve will
not be displayed.
*
Case Processing Summary
severity Valid N (listwise)
Positive 0
Negative 40070
Larger values of the test result variable(s) indicate stronger evidence for
a positive actual state.
The positive actual state is 0.
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