Message-ID: <f55e7cf50902280653x58035fb5u31439be332295995@mail.gmail.com>
Date: 2009-02-28T14:53:47Z
From: Ista Zahn
Subject: Unbalanced factorial designs
In-Reply-To: <p06240828c5ce5fa20333@192.168.1.108>
On Fri, Feb 27, 2009 at 10:29 PM, William Revelle <lists at revelle.net> wrote:
> Ista,
>
>
> At 8:01 PM -0500 2/27/09, Ista Zahn wrote:
>>
>> I see that the email has not gone through because of the attachment.
>> The file can be downloaded from
>>
>> http://prometheus.scp.rochester.edu/zlab/sites/default/files/InteractionsAndTypesOfSS.pdf
>>
>> -Ista
>>
>> On Fri, Feb 27, 2009 at 7:53 PM, Ista Zahn <izahn at psych.rochester.edu>
>> wrote:
>>>
>>> ?Hi everyone,
>>> ?This is not a very R-specific question, I hope that will be forgiven.
>>> ?I am the teaching assistant for the graduate level regression course
>>> ?in the department of clinical and social psychology at my university.
>>> ?Many of the students are very confused about the issues that arise
>>> ?when analyzing factorial designs with unequal cell sizes.
>>>
>>> ?I wrote the attached paper in an attempt to clarify these issues for
>>> ?them. I'm concerned that my attempt to help them understand the issues
>>> ?may just confuse them more, and I'm also concerned that I have be
>>> ?mistaken about some of the claims I make in this paper.
>>>
>>> ?If you have time to look it over at let me know if you spot any
>>> ?problems I would greatly appreciate it.
>
>
> ?From the point view of teaching ANOVA, this is great. ?But from the point
> of view of teaching how to use R to do the anova, it would be helpful to
> include the R commands for the doing the various analyses. (As well as
> creating those ?lovely tables.) ?Nice job.
Thanks for the encouragement, and the suggestions. I will definitely
use your suggestion to include the R code in an appendix, but I will
probably remove the table-making commands because few of the student's
use LaTeX and I think it would just confuse them.
Thanks again,
Ista
>
> Bill
>
>
>> ?>
>>>
>>> ?Thank you,
>>> ?Ista
>>>
>>
>> _______________________________________________
>> R-sig-teaching at r-project.org mailing list
>> https://stat.ethz.ch/mailman/listinfo/r-sig-teaching
>
>
> --
> William Revelle ? ? ? ? http://personality-project.org/revelle.html
> Professor
> http://personality-project.org/personality.html
> Department of Psychology ? ? ? ? ? ? http://www.wcas.northwestern.edu/psych/
> Northwestern University http://www.northwestern.edu/
> Use R for psychology ? ? ? ? ? ? ? ? ? ? ? http://personality-project.org/r
>