do group variables have to be included in a linear model which variable cannot be included in a general linear model because of its significance which variable is a covariate what is multicollinear what is the correlation of the covariate and the outcome measure what is the relationship of the covariate and a group in a general linear model? what is the covariate in a glm how to estimate the effect of a group in a linear model if the covariate is a confounder of the outcome measures of a study group, does the model include the covariate? when you use a covariate in a model, the effect of the covariate should be if an outcome variable is a confounder, how can you interpret the effect of a covariate do you need a covariate in a general linear model to find the effect of a group? which is a multicollinearity why do we use a covariate in a model which variable in the glm model has a covariate and is a confounder? why are the outcomes in multicollinearity model important how do you tell whether group is affected by group variable how do i know if group is affected what is the correlation coefficient for a variable with no covariate is the covariate correlated with the outcome?