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Table 7 Analysis of variance (ANOVA) for the response surface of full quadratic model for optimization of three variables (X1, glucose; X3, Cheese Whey; X5, corn steep liquor)

From: Significantly enhanced biomass production of a novel bio-therapeutic strain Lactobacillus plantarum (AS-14) by developing low cost media cultivation strategy

Source Sum of Square Degree of freedom Mean Square F-value P-value
X1 70.46 1 70.46 1182.44 0.0002
X1 2 0.021 1 0.021 0.345 0.4098
X3 10.19 1 10.19 171.07 0.0004
X3 2 1.160 1 1.160 521.321 0.001601
X5 34.60 1 34.60 580.57 0.00131
X5 2 0.029 1 0.029 0.551 0.23481
X1X3 23.78 1 23.78 399.10 0.0001
X1X5 23.59 1 23.50 395.80 0.0035
X3X5 20.52 1 20.52 344.37 0.0003
Lack of fit 0.01336 3 0.004112 2.001 0.311310
Pure error 0.061 2 0.056   
Total 184.425 14    
  1. R2: 0.9955; Adjusted R2:0.9936