Planned T Test in Standard least Square model

JenniferTaft — Mon, 26 Jun 2023 16:07:22 GMT

sorry if the question is obvious, but nooby alert!

I am running a full factorial model with Factor A, categorical 2 levels, Factor B, categorial 7 levels, and Factor C (participants) defined as a random factor.

I use the standard least square personality, and I have JMP. 15.

I have found a signiticant interaction between the factors A and B, and now I want to do 7 post-hoc t-tests between all the individual levels of B: i.e.
A1-B1 vs A2-B1;

A1-B2 vs A2-B2;

...

A1-B7 vs A2-B7;

if I used the "LSmean Students t" tools on the interaction, it will compute all possible pairs (including A1-B1 vs A2-B2, ...). This will have a consequence on my statistical power. So how can I restrict the t-test to just the one that I need?

Many thanks

Jennifer.

Re: Planned T Test in Standard least Square model

Mark_Bailey — Mon, 26 Jun 2023 19:29:47 GMT

The Fit Least Squares platform provides several post hoc tests. See the Custom Test option.

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Planned T Test in Standard least Square model

Re: Planned T Test in Standard least Square model