$X_1^2{X}_2$

2112.50

1

2112.50

2.04

0.1869

$X_1^2{X}_3$

6050.00

1

6050.00

5.84

0.0388

$X_1^2{X}_4$

1800.00

1

1800.00

1.74

0.2199

$X_1{X}_3^2$

22,204.17

1

22,204.17

21.45

0.0012

$X_2^2{X}_3$

7200.00

1

7200.00

6.95

0.0270

$X_2^2{X}_4$

36,450.00

1

36,450.00

35.21

0.0002

$X_2{X}_3^2$

9800.00

1

9800.00

9.47

0.0132

Residual

9317.70

9

1035.30

Lack of Fit

7712.50

5

1542.50

3.84

0.1082