https://communities.sas.com/t5/Statistical-Procedures/rank-based-ancova/m-p/348973#M18304 <P>Due to problems with non-normal residuals, I have run a rank-based ANOVA on my outcome variable (continuous). My indepedent variable is binary (Yes/No). I have 1 continous covariate in the model.</P><P>&nbsp;</P><P>When I look at median values for each group - they are quite different (10 vs. 97) - this is a score outcome. IQR is quite large as well.</P><P>&nbsp;</P><P>When I run my rank based ANOVA - the p value for the group is highly insignificant- both in the crude and adjusted models. How is this possible? The medians are so different.</P> Tue, 11 Apr 2017 05:24:02 GMT LucyB 2017-04-11T05:24:02Z https://communities.sas.com/t5/Statistical-Procedures/rank-based-ancova/m-p/348973#M18304 <P>Due to problems with non-normal residuals, I have run a rank-based ANOVA on my outcome variable (continuous). My indepedent variable is binary (Yes/No). I have 1 continous covariate in the model.</P><P>&nbsp;</P><P>When I look at median values for each group - they are quite different (10 vs. 97) - this is a score outcome. IQR is quite large as well.</P><P>&nbsp;</P><P>When I run my rank based ANOVA - the p value for the group is highly insignificant- both in the crude and adjusted models. How is this possible? The medians are so different.</P> Tue, 11 Apr 2017 05:24:02 GMT https://communities.sas.com/t5/Statistical-Procedures/rank-based-ancova/m-p/348973#M18304 LucyB 2017-04-11T05:24:02Z