* 非线性回归.
MODEL PROGRAM  b0=1.5 b2=0.0001 b3=-4 b1=0.01 b4=0.006 b5=0.5 b6=0.024 b7=-0.65 b8=0.1 b9=4.
COMPUTE  PRED_=b0+b1 * X1 * X1+b2 * X2 * X2+b3 * X3 * X3+b4 * X1 * X2+b5 * X1 * X3+b6 * X2 * X3+b7 * X1+b8 * X2+b9 * X3.
CNLR  cMn
  /OUTFILE='C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp\spss3804\SPSSFNLR.TMP'
  /PRED PRED_
  /SAVE PRED RESID DERIVATIVES
  /CRITERIA STEPLIMIT 2 ISTEP 1E+20.



表格中置信区间的上、下限之和为零，请大家帮忙分析分析  谢谢~~~