Stata The Stata listserver
[Date Prev][Date Next][Thread Prev][Thread Next][Date index][Thread index]

st: re: ANOVA model (my mistake)


From   David Airey <david.airey@Vanderbilt.Edu>
To   statalist@hsphsun2.harvard.edu
Subject   st: re: ANOVA model (my mistake)
Date   Sun, 29 Sep 2002 12:49:36 -0500

Just to end this thread, as per Ken's suggestion, page 46 [R] anova, is correct, and corresponds to Model 1 below, not Model 2. The EU (here, live animal) gets exposed to each treatment level in a repeated measures ANOVA, which is the case for both models below. I mistakenly thought that with subsampling, subunits should receive each treatment as well, but this need not be the case. Only the EU needs exposing to each treatment level for a nested repeated measures ANOVA. And my thoughts about nesting were wrong in the prior notes too. Sorry.

-Dave

Model 1
----------------------------------------------------------------------
Animal 1 2 3 4 5
/ \ / \ / \ / \ / \
Treatment 1 2 1 2 1 2 1 2 1 2
/ \ / \ / \ / \ / \ / \ / \ / \ / \ / \
Neuron 01-03 04-06 07-10 11-12 13-15 16-18 19-21 22-24 25-27 28-30
----------------------------------------------------------------------

Model 2
----------------------------------------------------------------------
Animal 1 2 3 4 5
/ \ / \ / \ / \ / \
Treatment 1 2 1 2 1 2 1 2 1 2
/ \ / \ / \ / \ / \ / \ / \ / \ / \ / \
Neuron 01-03 01-03 04-06 04-06 07-09 07-09 10-12 10-12 13-15 13-15
----------------------------------------------------------------------

*
* For searches and help try:
* http://www.stata.com/support/faqs/res/findit.html
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/




© Copyright 1996–2014 StataCorp LP   |   Terms of use   |   Privacy   |   Contact us   |   What's new   |   Site index