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Table 5

Analysis of variance for response surface method.

Source Sum of squares Degree of freedom Mean squares F-value P-value
Prob>F
Significance
Model 5.145E−004 14 3.675E−005 254.64 <0.0001 Yes
D 8.266E−006 1 8.266E−006 57.27 <0.0001 Yes
V 3.960E−004 1 3.960E−004 2743.68 <0.0001 Yes
μ 2.912E−006 1 2.912E−006 20.18 0.0006 Yes
N 5.204E−005 1 5.204E−005 360.55 <0.0001 Yes
D·V 4.271E−007 1 4.271E−007 2.96 0.1091 No
D·μ 4.259E−007 1 4.259E−007 2.95 0.1095 No
D·N 3.066E−006 1 3.066E−006 21.24 0.0005 Yes
V·μ 4.678E−007 1 4.678E−007 3.24 0.0951 No
V·N 1.022E−006 1 1.022E−006 7.08 0.0196 Yes
μ·N 1.163E−008 1 1.163E−008 0.081 0.7810 No
D2 1.832E−008 1 1.832E−008 0.13 0.7274 No
V2 5.542E−006 1 5.542E−006 38.40 <0.0001 Yes
μ2 1.784E−006 1 1.784E−006 12.36 0.0038 Yes
N2 2.040E−006 1 2.040E−006 14.13 0.0024 Yes
Residual 1.876E−006 13 1.443E−007
Lack of fit 1.876E−006 10 1.876E−007
Pure error 0.000 3 0.000
Total 5.164E−004 27

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