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2002 Aug 07
3
Forcing integers to be nominal
Hi everyone, I've got a problem with an analysis of variance where it appears that my independent variable is being treated as an integer when it should be nominal. The data are being loaded from an SPSS file and the independent variable 'YearColl' corresponds (surprisingly enough) to a student's year in college. :-) The integers 1-4 are used in the dataset for this purpose. My quick little anova gives this result: > mir.aov <- aov(DepressT ~ YearColl, data=mir) > summary(mir.aov) Df Sum Sq Mean Sq F value...