I was wondering if someone could get me started on how to interpret the
fit of the following nonlinear regression model?
*** Nonlinear Regression Model ***
Formula: CER ~ a * (2/(1 + exp(b * (NAREA - c))) - 1)
Parameters:
Value Std. Error t value
a 1.628010 0.381912 4.262790
b -0.840986 0.444459 -1.892160
c -0.298775 0.353828 -0.844408
Residual standard error: 0.30556 on 69 degrees of freedom
Correlation of Parameter Estimates:
a b
b 0.916
c -0.661 -0.895
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Kirk R. Wythers University of Minnesota
kwythers@lorax.forestry.umn.edu Department of Forest Resources
tel: 612.625.2261 1530 Cleveland Ave. N.
fax: 612.625.5212 Saint Paul, MN 55108
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