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Difference between difference of means
2 messages · Peter Zorg, 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
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