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  1. K

    N needed comparing groups in linear regression with many covariates-do I have to few?

    I have two easy, but for me at this point rather devastating, questions I was hoping for one kind hearted or bright individual,or two, to reply on. I'm doing a study with data from a national representative population study. The design is cross-sectional. I've run into serious troubles with...
  2. K

    Assumptions independent variables when just want to control/adjust for - less strict?

    Is it true that when one just want to control for/adjust for in linear og logistic regression models, the variables one wants to control for/adjust for does not have to meet the assumptions of these models? For instance, if one wants to control for age, sex and education (common confounders)...