Statistical Procedures

Programming the statistical procedures from SAS
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DJGS
Calcite | Level 5

Hello! I am using Proc Mixed. If the null likelihood ratio test is not statistically significant (I tried with 4 different covariance structures), is it nevertheless valid to report the type 3 tests of fixed effects? If it is not valid, what would you suggest I do? My model is pretty simple -- there are three repeated measures per individual, with two fixed effects, and one interaction. Thanks, as always, for your help! 

3 REPLIES 3
SteveDenham
Jade | Level 19

I assume all of the Type 3 tests are non-significant as well.  That would lead to the non-significant null likelihood, and then you should report those tests.

 

SteveDenham

DJGS
Calcite | Level 5

Thanks Steve... weirdly, 2 of the fixed effects are non significant, but one is (p=0.0144). Not sure what to do.. I can report it all, but I am not sure how to interpret this. Thanks for any additional thoughts. 

DJGS
Calcite | Level 5

Forgot to mention that I am dealing with a very small sample size...

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