Print

Print


 
Dear all,

Lets say i have two groups (1 and 2) defined by an extern variable (a
specific score calculated out of a questionaire). What gives me more
explanatory power:

A contrast between group 1 and 2 or a one sample t-test using the score
as covariate? 

And an additional question: How can i define the grand mean for the
covariate and should i use this option?


Thank you again in advance!

Best

Marco