LSMeans, still causing lots of people headaches [General Sta­tis­tics]

posted by ElMaestro  – Belgium?, 2019-02-03 18:39  – Posting: # 19851
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Hellobi :-D,

and thanks for helping towards an understanding.

I am a bit confused, what is ln[T] in your terminology?
Is it individual measurements, or effects form the b-vector or is it the average on the ln scale?
And what is the starting point for this?

Also, residuals -once a linear model has been fit to the least squares criterion- sum to zero, right? I got confused when you went from step 4 to 5.


» The Model Residual is the variance for the difference of LSMeans between Ln[T] and Ln[R].

Why?
I would think it is the plain uncertainty for an (within-) effect estimate in the b vector when we talk crossovers. Multiply by two and you have the variance of the difference or something like that.

I could be wrong, but...

Best regards,
ElMaestro

"Pass or fail" (D. Potvin et al., 2008)

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