Hi Mario. The annotated output on this UCLA webpage offers an explanation.
https://stats.idre.ucla.edu/spss/output/multinomial-logistic-regression/Cheers,
Bruce
[hidden email] wrote
> Dear experts,
> a colleague wants to do a logistic regression with NOMREG and gets this
> result:
>
> Case Processing Summary N Marginal Percentagetest ,00 358 35,8% 1,00 642
> 64,2%Valid 1000 100,0%Missing 0 Total 1000 Subpopulation 221a* *a The
> dependent variable has only one value observed in 131 (59,3%)
> subpopulations.
> Q. 1: What does "Subpopulation" and the number 221 refer to?Q. 2: What is
> the meaning of remark a and the number 131?
> Here's her syntax:
>
> NOMREG test (BASE=FIRST ORDER=ASCENDING) WITH v1 v2 v3 v4 v5 v6 v7 v8 v9
> v10 /CRITERIA CIN(95) DELTA(0) MXITER(100) MXSTEP(5) CHKSEP(20)
> LCONVERGE(0) PCONVERGE(0.000001) SINGULAR(0.00000001) /MODEL
> /STEPWISE=PIN(.05) POUT(0.1) MINEFFECT(0) RULE(SINGLE) ENTRYMETHOD(LR)
> REMOVALMETHOD(LR) /INTERCEPT=INCLUDE /PRINT=Classtable PARAMETER SUMMARY
> LRT CPS STEP MFI.
> Thanks for any idea.
>
> Mario GieselMunich, Germany
>
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