On 9/12/06, Douglas Bates <[EMAIL PROTECTED]> wrote:
> On 9/11/06, Manuel Morales <[EMAIL PROTECTED]> wrote:
[snip]
> > Am I right that the MCMC sample can not be used, however, to evaluate
> > the significance of parameter groups. For example, to assess the
> > significance of a three-level factor
> <[EMAIL PROTECTED]>;
> Sent: Wednesday, September 13, 2006 1:04 PM
> Subject: Re: [R] Conservative "ANOVA tables" in lmer
>
>
> > On Wed, 2006-09-13 at 08:04 +1000, Andrew Robinson wrote:
> >> On Tue, September 12, 2006 7:34 am, Manuel Morales wrote:
> &
> <[EMAIL PROTECTED]>;
> Sent: Wednesday, September 13, 2006 1:04 PM
> Subject: Re: [R] Conservative "ANOVA tables" in lmer
>
>
> > On Wed, 2006-09-13 at 08:04 +1000, Andrew Robinson wrote:
> >> On Tue, September 12, 2006 7:34 am, Manuel Morales wrote:
> &
- Original Message -
From: "Manuel Morales" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Cc: "Douglas Bates" <[EMAIL PROTECTED]>; "Manuel Morales"
<[EMAIL PROTECTED]>;
Sent: Wednesday, September 13, 2006 1:04 PM
Subject: Re: [R] Cons
On Wed, Sep 13, 2006 at 07:04:17AM -0400, Manuel Morales wrote:
> On Wed, 2006-09-13 at 08:04 +1000, Andrew Robinson wrote:
> > On Tue, September 12, 2006 7:34 am, Manuel Morales wrote:
> > > On Mon, 2006-09-11 at 11:43 -0500, Douglas Bates wrote:
> > >> Having made that offer I think I will now wi
[snip]
Douglas Bates wrote:
> Hmm - I'm not sure what confidence interval and what number of levels
> you mean there so I can't comment on that method.
>
> Suppose we go back to Spencer's example and consider if there is a
> signficant effect for the Nozzle factor. That is equivalent to the
> h
On Wed, 2006-09-13 at 08:04 +1000, Andrew Robinson wrote:
> On Tue, September 12, 2006 7:34 am, Manuel Morales wrote:
> > On Mon, 2006-09-11 at 11:43 -0500, Douglas Bates wrote:
> >> Having made that offer I think I will now withdraw it. Peter's
> >> example has convinced me that this is the wrong
On Tue, September 12, 2006 7:34 am, Manuel Morales wrote:
> On Mon, 2006-09-11 at 11:43 -0500, Douglas Bates wrote:
>> Having made that offer I think I will now withdraw it. Peter's
>> example has convinced me that this is the wrong thing to do.
>>
>> I am encouraged by the fact that the results
On 9/11/06, Manuel Morales <[EMAIL PROTECTED]> wrote:
> On Mon, 2006-09-11 at 11:43 -0500, Douglas Bates wrote:
> > On 9/10/06, Andrew Robinson <[EMAIL PROTECTED]> wrote:
> > > On Thu, Sep 07, 2006 at 07:59:58AM -0500, Douglas Bates wrote:
> > >
> > > > I would be happy to re-institute p-values for
On Mon, 2006-09-11 at 11:43 -0500, Douglas Bates wrote:
> On 9/10/06, Andrew Robinson <[EMAIL PROTECTED]> wrote:
> > On Thu, Sep 07, 2006 at 07:59:58AM -0500, Douglas Bates wrote:
> >
> > > I would be happy to re-institute p-values for fixed effects in the
> > > summary and anova methods for lmer o
:54:50 PM
> > To: Andrew Robinson <[EMAIL PROTECTED]>
> > Cc: Douglas Bates <[EMAIL PROTECTED]>, R-Help > [EMAIL PROTECTED]>
> > Subject: Re: [R] Conservative "ANOVA tables" in lmer
> >
> >
> > Hi, Doug, et al.:
> > I'll vo
On 9/10/06, Andrew Robinson <[EMAIL PROTECTED]> wrote:
> On Thu, Sep 07, 2006 at 07:59:58AM -0500, Douglas Bates wrote:
>
> > I would be happy to re-institute p-values for fixed effects in the
> > summary and anova methods for lmer objects using a denominator degrees
> > of freedom based on the tra
Martin Henry H. Stevens wrote:
> Hi Spencer,
> I would like to make sure I understand Spencer's question and doubt's,
> below.
> On Sep 9, 2006, at 11:36 PM, Spencer Graves wrote:
>
>> Peter's example and Doug's "different test" reply sent me
>> Scheffé's discussion of the balanced and rep
Hi Spencer,
I would like to make sure I understand Spencer's question and
doubt's, below.
On Sep 9, 2006, at 11:36 PM, Spencer Graves wrote:
> Peter's example and Doug's "different test" reply sent me
> Scheffé's discussion of the balanced and replicated mixed-effect 2-
> away layout. A
Peter's example and Doug's "different test" reply sent me
Scheffé's discussion of the balanced and replicated mixed-effect 2-away
layout. As I note below, the obvious F test for the fixed effect does
not appear to be likelihood ratio for anything.
Douglas Bates wrote:
> On 9/7/06, Dougl
Canberra ACT 0200.
On 10 Sep 2006, at 8:00 PM, [EMAIL PROTECTED] wrote:
> From: Spencer Graves <[EMAIL PROTECTED]>
> Date: 10 September 2006 4:54:50 PM
> To: Andrew Robinson <[EMAIL PROTECTED]>
> Cc: Douglas Bates <[EMAIL PROTECTED]>, R-Help [EMAIL PROTECTED]>
>
Spencer,
Would you add the reference to the WIKI? I think it would help round out this
thread.
John
John Sorkin M.D., Ph.D.
Chief, Biostatistics and Informatics
Baltimore VA Medical Center GRECC,
University of Maryland School of Medicine Claude D. Pepper OAIC,
University of Maryland Clinical Nutr
Hi, Doug, et al.:
I'll volunteer to do the same, which is an extension of much of
what I've been doing for R Help for a while now.
Regarding writing a FAQ, what about a Wiki entry (and maybe
ultimately a vignette)? This thread provides notes around which such
could be built. An
On Thu, Sep 07, 2006 at 07:59:58AM -0500, Douglas Bates wrote:
> I would be happy to re-institute p-values for fixed effects in the
> summary and anova methods for lmer objects using a denominator degrees
> of freedom based on the trace of the hat matrix or the rank of Z:X if
> others will volunte
On 9/7/06, Douglas Bates <[EMAIL PROTECTED]> wrote:
> On 07 Sep 2006 17:20:29 +0200, Peter Dalgaard <[EMAIL PROTECTED]> wrote:
> > Martin Maechler <[EMAIL PROTECTED]> writes:
> >
> > > > "DB" == Douglas Bates <[EMAIL PROTECTED]>
> > > > on Thu, 7 Sep 2006 07:59:58 -0500 writes:
> > >
>
Dear list,
I have written functions to perform simulation-based tests of
HO: Var(Random Effects)=0, beta_foo=0
in linear mixed models based on the exact distribution of the LR- and
Restricted LR-test statistic (see research presented in
Crainiceanu, Ruppert: "LRT in LMM with 1 variance component
Dear list,
I have written functions to perform simulation-based tests of
HO: Var(Random Effects)=0, beta_foo=0
in linear mixed models based on the exact distribution of the LR- and
Restricted LR-test statistic (see research presented in
Crainiceanu, Ruppert: "LRT in LMM with 1 variance componen
On 07 Sep 2006 17:20:29 +0200, Peter Dalgaard <[EMAIL PROTECTED]> wrote:
> Martin Maechler <[EMAIL PROTECTED]> writes:
>
> > > "DB" == Douglas Bates <[EMAIL PROTECTED]>
> > > on Thu, 7 Sep 2006 07:59:58 -0500 writes:
> >
> > DB> Thanks for your summary, Hank.
> > DB> On 9/7/06,
Martin Maechler <[EMAIL PROTECTED]> writes:
> > "DB" == Douglas Bates <[EMAIL PROTECTED]>
> > on Thu, 7 Sep 2006 07:59:58 -0500 writes:
>
> DB> Thanks for your summary, Hank.
> DB> On 9/7/06, Martin Henry H. Stevens <[EMAIL PROTECTED]> wrote:
> >> Dear lmer-ers,
> >> M
On 9/7/06, Martin Maechler <[EMAIL PROTECTED]> wrote:
> > "DB" == Douglas Bates <[EMAIL PROTECTED]>
> > on Thu, 7 Sep 2006 07:59:58 -0500 writes:
>
> DB> Thanks for your summary, Hank.
> DB> On 9/7/06, Martin Henry H. Stevens <[EMAIL PROTECTED]> wrote:
> >> Dear lmer-ers,
>
> "DB" == Douglas Bates <[EMAIL PROTECTED]>
> on Thu, 7 Sep 2006 07:59:58 -0500 writes:
DB> Thanks for your summary, Hank.
DB> On 9/7/06, Martin Henry H. Stevens <[EMAIL PROTECTED]> wrote:
>> Dear lmer-ers,
>> My thanks for all of you who are sharing your trials and tri
Dear Douglas,
> I would be happy to re-institute p-values for fixed effects in the
> summary and anova methods for lmer objects using a denominator
> degrees of freedom based on the trace of the hat matrix or the rank
> of Z:X
Please do!
> if others will volunteer to respond to the "these answer
Thanks for your summary, Hank.
On 9/7/06, Martin Henry H. Stevens <[EMAIL PROTECTED]> wrote:
> Dear lmer-ers,
> My thanks for all of you who are sharing your trials and tribulations
> publicly.
> I was hoping to elicit some feedback on my thoughts on denominator
> degrees of freedom for F ratios
Dear lmer-ers,
My thanks for all of you who are sharing your trials and tribulations
publicly.
I was hoping to elicit some feedback on my thoughts on denominator
degrees of freedom for F ratios in mixed models. These thoughts and
practices result from my reading of previous postings by Doug
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