can a lack of fit error occur simultaneously? lack of fit error is called lack fit error is pure error lack of fit error definition lack of fit error vs pure error lack of fit and pure error can lack of fit error cause pure error can a lack of fit error be caused by an error can lack of fit error contribute to residual error? does lack of fit error contribute to residual what is pure error and lack of fit what is an incomplete lack of fit error in an analysis? lack of fit error is pure error is lack of fit error a pure error lack of fit error definition is there a difference between pure error and lack of fit when can lack of fit error occur simultaneously lack of fit error definition lack of fit error and pure error what is lack of fit error, if no observations are performed