[R] Difference between difference of means

[John Fox]

Dear Peter,

This looks like a two-way ANOVA, with product as one factor and condition as
the other. The test that you describe is for the interaction between product
and condition.

I hope this helps,
 John

--------------------------------
John Fox
Department of Sociology
McMaster University
Hamilton, Ontario
Canada L8S 4M4
905-525-9140x23604
http://socserv.mcmaster.ca/jfox 
-------------------------------- 

> -----Original Message-----
> From: r-help-bounces at stat.math.ethz.ch 
> [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Peter Zorg
> Sent: Wednesday, May 04, 2005 9:24 AM
> To: r-help at stat.math.ethz.ch
> Subject: [R] Difference between difference of means
> 
> Hi
> I would like to compare two differences of means.
> I have the means of the log of one variable for two 
> conditions for one product, and for another product.
> The differences look different between both products for the 
> two conditions, but a statistical test is required.
> Thank you for any hint
>  
> Peter
> 
> __________________________________________________
> 
> 
> 
> 	[[alternative HTML version deleted]]
> 
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide! 
> http://www.R-project.org/posting-guide.html