which model has constants and insignificant mean why is constant ols why should we keep the constant in ols why is it necessary to keep a constant in ols? why ols model keeps constant which model always has a constant why is an ols constant constant why is it useful to keep the constant in a model why we must use constant model why keep constant in model why are constants important in ollis model ols model constant meaning why are constants used in ols models is the model constant or constant why is constant an important variable in an ols model why is it important to keep the constant in an ols model how to tell when ols is constant why is mean constants ols why is it required to keep the constant model in els why is ols model constant