Programming the statistical procedures from SAS

ss3 (Type 3 empty)

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Learner
Posts: 1

ss3 (Type 3 empty)

[ Edited ]

I have run both a proc mixed and a proc glm on my data the Type 3 table keeps coming upt empty. on the Type 1 table items are significant but Type 3 is blank. What does this mean?

 

Source        DF     Type III SS    Mean Square    F Value    Pr>F

Location       0           0

Age              0           0

Meds           0            0

SAS Super FREQ
Posts: 3,477

Re: ss3 (Type 3 empty)

Hard to say without more information. Can you post the program and/or other output?

SAS Super FREQ
Posts: 3,477

Re: ss3 (Type 3 empty)

Are you fitting too many interaction terms (a saturated model)? Or are one of these variables categorical with a large number of parameters? (For example, almost as many parameters as valid observations?) It looks like you are including some term in the model that sucks up all the variation among the means, thus leaving no variation for the other effects.

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