Dear Tipsters, I have puzzled over this question for a long time.
When conducting an ANOPVA in SPSS, we have two options for obtaining means in
each condition.
1. Click on descriptives. This gives means, standard deviations and sample
sizes for all main effects and interactions. They appear at the beginning of
the printout.
2. Under options, you can specify which means you want. This gives means and
standard errors for the effects and interactions that you specify. They appear
at the end of the printout.
My question is: Why are these means sometimes different from the ones in the
descriptives in 1? I think I have seen the term "estimated marginal means",
with a reference to covariates, but if there are no covariates (it is ANOVA not
ANCOVA), I do not understand this.
I would have thought that a mean was a mean in ANOVA.
Sincerely,
Stuart
___________________________________________________________________________
"Floreat Labore"
[cid:[email protected]]
"Recti cultus pectora roborant"
Stuart J. McKelvie, Ph.D., Phone: 819 822 9600 x 2402
Department of Psychology, Fax: 819 822 9661
Bishop's University,
2600 rue College,
Sherbrooke,
Québec J1M 1Z7,
Canada.
E-mail: [email protected]<mailto:[email protected]> (or
[email protected]<mailto:[email protected]>)
Bishop's University Psychology Department Web Page:
http://www.ubishops.ca/ccc/div/soc/psy<blocked::http://www.ubishops.ca/ccc/div/soc/psy>
Floreat Labore"
[cid:[email protected]]
[cid:[email protected]]
___________________________________________________________________________
---
You are currently subscribed to tips as: [email protected].
To unsubscribe click here:
http://fsulist.frostburg.edu/u?id=13090.68da6e6e5325aa33287ff385b70df5d5&n=T&l=tips&o=14886
or send a blank email to
leave-14886-13090.68da6e6e5325aa33287ff385b70df...@fsulist.frostburg.edu<<inline: image007.jpg>>
<<inline: image008.jpg>>
<<inline: image009.jpg>>
