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| Different group sizes multiple group |
 
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| Gerine L posted on Thursday, June 04, 2015 - 8:34 am
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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? |
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| Having very different group sizes will affect the results. The small group has less power. There is noting you can do to compensate for this. |
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