Question: In a linear regression setting, we have a single response Y and two covariates, X and Z. The population model is: = 0 1 2

In a linear regression setting, we have a single response Y and two covariates, X and Z. The population model is: = 0 1 2 Y i = 0 1 X i 2 Z i i With respect to the effect of X on the response Y, is Z considered to be an effect modifier? Choice 1 of 2:No Choice 2 of 2:Yes

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