Hello, I have run into a strange problem. I am running N-way anova and what I have found out is if i change the order of the variables that I am using in the anova, then the P-values are changing E.g. when I run the below procedure ods noproctitle; ods graphics / imagemap=on; proc glm data=WORK.INTERNETDATA; class Exits Continent Sourcegroup Uniquepageviews Bounces Visits; model Timeinpage=Exits Continent Sourcegroup Uniquepageviews Bounces Visits / ss1 ss3; lsmeans Exits Continent Sourcegroup Uniquepageviews Bounces Visits / adjust=tukey pdiff=all alpha=0.05 cl; quit; The value of Sourcegroup is significant i.e. 0.0037 Now when i change the sequence of the variable Bounces to something like this ods noproctitle; ods graphics / imagemap=on; proc glm data=WORK.INTERNETDATA; class Bounces Exits Continent Sourcegroup Uniquepageviews Visits; model Timeinpage=Bounces Exits Continent Sourcegroup Uniquepageviews Visits / ss1 ss3; lsmeans Bounces Exits Continent Sourcegroup Uniquepageviews Visits / adjust=tukey pdiff=all alpha=0.05 cl; quit; The value of the variable Souregroup is no longer significant i.e. 0.0752 Can somebody tell me why is this occuring. Thanks and regards, Aditya
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