Figure 4From: Improvement of antibiotic activity of Xenorhabdus bovienii by medium optimization using response surface methodologyResidual diagnostics of the contour surface of the quadratic model. A) The predicted vs. observed by replicates of antibiotic activity of Xenorhabdus bovienii YL002. B) Normal probability of internally studentized residuals. C) Plot of internally studentized residuals vs. predicted response.Back to article page