```Date: Dec 7, 2012 6:36 PM
Author: Ray Koopman
Subject: Re: Must we say S,N instead of N,S if we've said "Subset x MoSS" (not<br> MoSS x Subset) ???

On Dec 7, 12:13 pm, djh <halitsk...@att.net> wrote:> It didn't occure to me to ask if we must say S,N (instead of N,S) if> we've said "Subset x MoSS" (not MoSS x Subset).>> If we're obligated to do so, then of course the two tables must be> presented as:>> SE and p values for u^2 in regression c on (e,u,u*e,u^2) for each> value of subset x MoSS | (Fold,Set,Len) = (all,all,all)> --------------------> Subset>   x         u^2> MoSS      SE     p>> S,N     35.17  0.457> C,N     38.19  0.416> S,R     36.88  0.434> C,R     34.69  0.438> -------------------->> 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> MoSS      SE     p>> S,N     0.491  0.454> C,N     0.602  0.462> S,R     0.547  0.463> C,R     0.512  0.4781. What does "(Fold,Set,Len) = (all,all,all)" mean?2. Something's wrong somewhere. Those p's are too similar to oneanother, and are too large to be consistent with the other resultsyou've been reporting.3. If all the p's for u^2 are truly that big then you should probablydrop the quadratic model. Model selection generally starts with themost complicated model and works down. In particular, you should notbe considering any results from regressing c on (u,u^2) if e matters.4. SEP = sqrt[Residual Sum of Squares / df]       = sqrt[Residual Mean Square]Are you sure Ivo's program doesn't give that as optional output?5. Let the constant in the input to Ivo's program default to 1.6. I have a hunch that Het may be related to a Subset x Foldinteraction, where the d.v. is the average slope.7. Your forthcoming explanation "using reasoning based on thebehavior of the average slope Auq of c on (u,u^2) and the covarianceAubC of e and u in c on (u,e,u*e)" will probably go right over myhead, because I have only a hunch about what the average slope Auqof c on (u,u^2) might mean, and not a clue about what the covarianceAubC of e and u in c on (u,e,u*e) might mean.Enough for now.
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