Confidence Intervals and Curvature Measures in Nonlinear Regression
نویسنده
چکیده
Interval estimates for nonlinear parameters using the linear approximation are sensitive to parameter curvature effects. The adequacy of the linear approximation (Wald) interval is determined using the nonlinearity measures of Bates and Watts (1980), and Clarke (1987b), and the profile t plots of Bates and Watts (1988). These curvature measures and profile t plot calculations are . e ® implemented uSing the SAS/IML and SAS/NUN procedures.
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