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Table. 6.

Table. 6.

Analysis of variance of the response surface quadratic model.

Source DFa Adj SSb Adj MSc F-value P-value
Model 9 3.99061 0.44340 33.22 < 0.0001
X1 1 1.95502 1.95502 146.46 < 0.0001
X2 1 0.13981 0.13981 10.47 0.0089
X3 1 0.42885 0.42885 32.13 0.0002
X1X2 1 0.00002 0.00002 0.00 0.9714
X1X3 1 0.00088 0.00088 0.07 0.8024
X2X3 1 0.00065 0.00065 0.05 0.8301
X12 1 1.23057 1.23057 92.18 < 0.0001
X22 1 0.14479 0.14479 10.85 0.0081
X32 1 0.28321 0.28321 21.22 < 0.0010
Residual 10 0.13349 0.01335
Lack of fit 5 0.09443 0.01889 2.42 0.1774
Pure error 5 0.03906 0.00781
Total 19 4.12410

R2 = 0.9676; adjusted R2 = 0.9385; R = 0.9837.

aDegree of freedom.

bSum of squares.

cMean square.

J. Microbiol. Biotechnol. 2021;31:717~725 https://doi.org/10.4014/jmb.2103.03018
© J. Microbiol. Biotechnol.