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Table 4 ANOVA value obtained from quadratic rotation-regressive design employed in optimization of hemicellulose fractionation yield during steam explosion pretreatment

From: Multilevel composition fractionation process for high-value utilization of wheat straw cellulose

Factor Sum of squares Degree of freedom Mean square Freedom ratio P value
Corrected model 427.018 7 61.003 47.982 0.000
x1 144.993 3 48.331 38.015 0.003
x2 237.313 3 79.104 62.220 0.005
Error 6.357 5 1.271   
Corrected total 433.375 12