sim_base_lm()
will start a linear model: One regressor, one error
component. sim_base_lmm()
will start a linear mixed model: One
regressor, one error component and one random effect for the domain.
sim_base_lmc()
and sim_base_lmmc()
add outlier contamination to
the scenarios. Use these as a quick start, then you probably want to
configure your own scenario.