what is nan which graph is a fitted vs. residuals plot what is perOOgivenp? what is perogivenp what is perogivenp? what is perogivenp what is perogivenp what is perogivenp what is perogivenp used for is perogivenp binary? when is the perogivenp plot what does perogivenp mean on a mixed model what is a perogivenp in regression why do residuals look different what is perogivenp what is perogivenp what is perogivenp what is the difference between fitted and residual plot what is the nan formula for qq plot what is perogivenp?