On Sat, May 28, 2016 at 09:31:25PM -0500, Alan Mead wrote:
John,
Sorry for the delay.
Attached is the SPSS output.
I also ran PSPP and I notice that PSPP calculates negative SS for this
analysis, which produces negative MS, Negative F's, etc.
If I add "select if( not sysmis(agree_score))." before GLM, I reproduce
the SPSS output. Seems like not treating missing values is part (or the
entirety?) of the problem? I wondered if perhaps SPSS 24 might mark
missing values in a new way that is confusing to PSPP? But that's pure
hypothesizing...
Thanks Alan,You are right - this is entirely due to missing values. I'm somewhat relieved that it is not something more fundamental. But the problem I see now is that SPSS does not document how it treats missings. Perhaps you could do some experiments. For example, do missing values in the factor variables get treated as a separate factor value or does the case get simply dropped? And what about the dependent variables? If there are say 2 dependent variables and one is missing what happens then? Is the case dropped for both anayses or just the one that is missing? J' -- Avoid eavesdropping. Send strong encryted email. PGP Public key ID: 1024D/2DE827B3 fingerprint = 8797 A26D 0854 2EAB 0285 A290 8A67 719C 2DE8 27B3 See http://sks-keyservers.net or any PGP keyserver for public key.
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