Overspecified model [General Sta­tis­tics]

posted by d_labes  – Berlin, Germany, 2011-06-29 11:39 (5465 d 20:36 ago) – Posting: # 7184
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Dear Helmut!

❝ ... Yes, old story. SAS complains about an over-specified model (T is not repeated) and gives a variance for T ...


Here you are in mistake. Randombadgers sequences are TRR / RTT, R replicated in the first sequence group, T replicated in the second.

Nevertheless the model may be over-specified if the subject-by-treatment interaction in the model turns out to be zero for the analysed data set.

The CS (compound symmetric) structure is then the more appropriate but is also to some extent over-specified. See my attempt to dance.

Regards,

Detlew

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