Approach to interpreting nonlinear regression results

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s	Questions
	Are results sensible?
	SE and CI
	Goodness of fit
	Systematic deviation
	Local minimum
	Assumptions
	Common errors

Comparing two curves

Distributions of best-fit values

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Approach to interpreting nonlinear regression results

When evaluating the results of nonlinear regression, ask yourself:

Do the nonlinear regression results make sense?
How certain are the best-fit values?
How good is the fit?
Does the curve systematically deviate from the data?
Could the fit be a local minimum?
Have you violated an assumption of nonlinear regression?
Have you made a common error when using nonlinear regression?

You'll also want to interpret the data in the context of the experiment. For example, see the discussions on this web site for analyses of radioligand binding, enzyme kinetics or dose-response data.

Do the nonlinear regression results make sense?