Fig. 4From: Eggshell waste bioprocessing for sustainable acid phosphatase production and minimizing environmental hazardsModel adequacy checking of OCCD: a Normal probability plot of the residuals. b Externally studentized residuals versus predicted ACP production. c Plot of predicted versus actual ACP production. d Box-Cox plot. e The optimization plot displays the desirability function and the optimum predicted values for the maximum ACP productionBack to article page