what's the relationship between mean and variance in regression what is mean and variance regression what is the mean structure of a regression what is the relationship between mean and variance in regression what is mean in regression what is meant by mean structure in regression what is meant by the mean structure and the mean variance what is meant by a mean structure in a regression what is a relationship between the mean and mean? what is meant by mean/variance what relationship between mean structure and variance? define mean structure in regression what is the difference between mean and variance in a regression what is the relationship between mean and variance what is mean/variance in regression what is means in regression how is the relationship between mean structure and mean variable? what is meant by a mean structure and a vs mean correlation why is regression important mean structure in order regression