Alan,
Agresti (Categorical Data Analysis, Wiley, 1990 - possible also later)
mentions similar techniques (e.g. in Ch. 3.3.5) although not exactly the same
ones
what you are using (stressing the independence of the components within the
partitioning). He cites also original publications which m
My thanks to Don, Chuck, Michael and Alan for their responses to my
query. I will follow up the varius suggestions.
Alan
Chuck Cleland wrote:
>
> Chuck Cleland wrote:
> > Goodman, L. A. (1996). How to ransack social mobility tables and other kinds of
> > cross-classification tables. American Jo
Setting the negative eigenvalues (of which there may be many !) to zero
provides the least squares solution. Thus it gives \hat C such that
||C-\hat C||^2 is minimal over all psd matrices \hat C.
If C is a correlation matrix (as suggested below) then of course
C is already psd. If C is a matrix w
Agresti, Categorical Data Analysis, sec 3.3.5-3.3.7, has a brief discussion of
partioning chi-square with a bunch of references including several by Goodman.
This describes some ways of breaking down the total chi-square into components
that are asymptotically chi^2(1) as sample size increases in
Siegel and Castellan, Nonparametric Statistics for the Behavioral Sciences
(2nd ed., McGraw-Hill, 1988), discuss partitioning the degrees of freedom
and analyzing residuals in r x k contingency tables. They argue that,
because individual cell residuals are not independent, it is safer to
combine t
At 03:46 PM 7/6/00 +, Christian A. Walter wrote:
>Does anyone know if there is a structured way to adjust a negative
>definite matrix such that it becomes semi-definite, while "minimizing"
>the induced changes to the matrix?
>
>Cheers,
>Christian
I posed a similar question to edstat last fall
John Hendrickx ([EMAIL PROTECTED]) wrote:
: In article <396259e6$0$[EMAIL PROTECTED]>, [EMAIL PROTECTED]
: says...
: >
: > Is there a freeware (or cheap, <$200) software package that can
: > setup and analyze factorial designs and do response surface analyses?
: > I looked at the "R" software an
Does anyone know if there is a structured way to adjust a negative
definite matrix such that it becomes semi-definite, while "minimizing"
the induced changes to the matrix?
Cheers,
Christian
Sent via Deja.com http://www.deja.com/
Before you buy.
===
Hi all,
I am having trouble with deriving maximum likelihood estimators for
parameters in a very simple (?) linear model. Presumably, I am missing some
very fundamental principles of (ML-) estimation theory (I think with respect
of some relation between degrees of freedom and ML-estimation), whic
International Association for Statistical Education
Carol Blumberg from Winona State University and I have recently become
national correspondents for the United States for the International
Association for Statistical Education. The role of national
correspondents is to promote communication be
I'll bite.
Here's my answer. I believe it shows I've learned something in
graduate school. Maybe I'm ready to receive my PhD:
It depends.
Is a doctorate a certificate? Like a union card? Then yes, passing
tests and writing essays should be a sufficient right of passage.
Is a doctorate a fo
Olympio:
I used the Minitab menus to produce the following code
and graph the standard normal density. To do other densities
you need to change the range of values appropriately and
change the density calculated and stored.
Hope this helps.
Jon Cryer
MTB > Name c1 = 'z'
MTB > Set 'z'
DATA>
I need some advice about a data set I've inherited. In the data, students
have rated professors on their teaching style/ability. The problem is that
students complete several evaluations of different professors as they go
through their rotations. A student may have completed as many as 40
e
Chuck Cleland wrote:
> Goodman, L. A. (1996). How to ransack social mobility tables and other kinds of
> cross-classification tables. American Journal of Sociology, 75, 1-40.
That should be 1969 not 1996.
Chuck
--
Chuck Cleland
Institute for the Stud
> On Thu, 6 Jul 2000, Alan McLean wrote:
>
> > For some years I have been teaching a technique which I know as testing
> > the components of chi square in a standard contingency table problem.
> >
> > My problem is that I have no source for this technique. I have never
> > seen it in a textbook.
I don't have an answer to Alan's question, but a description of another
technique in trying to perceive what a contingency table might be trying
to tell one. Like Alan, I have not seen this mentioned in textbooks;
OTOH, I wouldn't expect to, because I think it analogous to post-hoc
tests in
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