Figure 4.

Modeling diagnostics The points in graphs of the standardized residuals versus the loge standard concentrations (A) and the standardized residuals versus the estimated loge spot intensities (B) are reasonably well behaved, showing no strong systematic trends or deviations from the zero line. These indicate that the four-parameter logistic model is acceptable, that subsequent statistical inferences are reasonable, but that a better model may exist in another model family.

Daly et al. BMC Bioinformatics 2005 6:17   doi:10.1186/1471-2105-6-17
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