[R] Difference between difference of means

From: Peter Zorg <przorg_at_yahoo.com>
Date: Thu 05 May 2005 - 00:23:37 EST


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


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