Fig. 2From: Enhancement of herbicolin A production by integrated fermentation optimization and strain engineering in Pantoea agglomerans ZJU23Response to the effects of standardized residuals and standardized effects on HA production. a Normal probability plot of the standardized residuals for HA production. b Half normal probability plot of the standardized effects for HA production. c Pareto chart ranking the standardized effects of the factors for HA production. Bars that are above the reference line (dotted line in figure) are statistically significant at a P-value < 0.05Back to article page