Table 2. Analyses of variance for statistical models

A. Analysis of variance for the 2nd-order model on the original data in Table 1A
Model terms: X1, X2; X12, X22; X1X2
Source	Degrees of freedom	Sum of squares	Mean square	F-value	p-value
Model	5	988.452	197.690	0.21	0.9460
Error	7	6,489.923	927.132
Total	12	7,478.375
Root MSE=30.4488		Coefficient of variation=15.80%		r2=0.1322

MSE, mean square error.