lack of fit regression definition lack of fit in regression analysis what is lack of fit in regression analysis does regression allow lack of fit analysis lack of fit definition regression which model uses replication lack of fit in regression does lack of fit allow replication lack of fit analysis definition lack fit analysis how does lack of fit affect regression lack of fit analysis and replication lack of fit in regression analysis lack of fit definition regression replication in regression does lack of fit support replication what does lack of fit mean does lack of fit in regression modeling mean that the models replicate what is replication and lack of fit in regression modeling? why do I think it's important to replicate at a range of predictor values