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Trying to run a ind t-test, says 'at least on of the groups is empty. HELP!? 3 2575 (11/3/2009 1:22:13 AM) comp.soft-sys.stat.spss Im trying to write a practical report for uni. In doing so I am required to test the difference between males and females in scores of 3 different tests. One of the tests works, but the other 2 dont, saying ... Krystal89