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Dear Palm experts, I have a data set that includes 6 cohorts of "controls", each scanned with different protocols. As such I would like to check if there are any significant differences between the different "control" groups. As an initial question (and to save time) I would like to know if there are any differences regardless of direction. In this sense I was planning to use an f-test. So far I have the design.con as: 1 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 1 I would like to know if the design.fts should be: a) 1 1 1 1 1 1 OR b) 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Many thanks for your help, Isaac ######################################################################## To unsubscribe from the FSL list, click the following link: https://www.jiscmail.ac.uk/cgi-bin/webadmin?SUBED1=FSL&A=1