why does parametric model differ can you test if the data are nonlinear why is a model nonlinear? why does a model become nonlinear what makes a nonlinear model robust why do parameter values change when removing terms why is a non linear model robust why do nonlinear model parameters change why is nonlinear model robustness so important when one term is removed what changes the value of another term? how does a nonlinear model differ when removing terms when removing terms, parameter values change nonlinear model robustness why does nonlinearity overlap with confidence intervals? how does the value of parameter change when removing a term when removing a term, the model model value changes why is a model nonlinear when you remove a parameter whose value is not linear or nonlinear can the parameter values of a nonlinear model overlap why does a model change the value of parameters when removed