Gerine L posted on Thursday, June 04, 2015 - 8:34 am
I have a very simple model:
Y = b0 + b1 X.
Both Y and X are scale variables and non-normally distributed (thus I use the MLR estimator).
I want to examine whether results for this model differ between group A (young participants, around 1100) and group B (old participants, around 175). I want to test whether differences occur in b0 and b1.
Can I reliably conclude that X is related to Y for group B but not for group A, if my sample size for group A is so much smaller than for group B?