Date: Dec 7, 2012 2:25 PM
Author: Ray Koopman
Subject: Re: SE's and p's for four subset x MoSS roll-ups of u*e coefficient<br> in c = (u,e,u*e)
On Dec 7, 9:27 am, djh <halitsk...@att.net> wrote:

> Here are the average SE and p values for u*e in the regression c on

> (u,e,u*e), for each value of subset x Moss | (Fold,Set,Len) =

> (all,all,all)

>

> --------------------

> subset

> x u*e

> Method SE p

>

> SxN 0.491 0.454

> SxC 0.602 0.462

> SxR 0.547 0.463

> SxC 0.512 0.478

> --------------------

I'm confused by the "subset x Method" labels in this and your two

previous posts. If the Subsets are S and C, and the Methods are N

and R, then the labels should be some permutation of (S,N), (S,R),

(C,N), and (C,R).

Also, as I've mentioned before, the "x" is usually used to refer to

factors -- e.g., Subset x Method -- not particular combinations of

levels of the factors. The "x" denotes the Cartesian product of the

two factors; each combination is an ordered pair, conceptually the

same as ordinary (x,y) coordinates. (The parentheses can be dropped,

as befits the context.)

>

> Unlike the previous case of u^2 in c on (e,u,u*e,u^2), SxN DOES have

> the lowest SE and the lowest p.

>

> Now, I'm sure you'll say the differences are meaningless.

>

> But there has to be some reason why the average slope Aube of the e

> coefficient in c = (u,e,u*e) is giving us the striking "het" result at

> method = N and sets 1, 3:

>

> a1 a3 b1 b47 c1 c2

> C S C S c S c S C S C S "Het"

>

> N1 Aube H H L L H H H H L L L L 0

> N3 Aube L L H H L L H H H H L L 0