Terms

Regression coefficient

Standard error of the coefficient

t-value

P-value

Constant

−284.636

23.05693

−12.3449

0.000000^a

X₁

13.021

0.98283

13.2488

0.000000^a

X₂

2.589

0.19657

13.1705

0.000000^a

X₃

4.169

0.19657

21.2103

0.000000^a

X₄

1.799

0.14635

12.2897

0.000000^a

X₁*X₁

−1.048

0.02388

−43.9039

0.000000^a

X₂*X₂

−0.051

0.00096

−53.1165

0.000000^a

X₃*X₃

−0.041

0.00096

−43.066

0.000000^a

X₄*X₄

−0.002

0.00024

−10.3511

0.000000^a

X₁*X₂

0.052

0.00625

8.2956

0.000001^a

X₁*X₃

−0.044

0.00625

−6.9763

0.000004^a

X₁*X₄

−0.017

0.00313

−5.2972

0.000090^a

X₂*X₃

0.001

0.00125

0.995

0.382589

X₂*X₄

−0.003

0.00063

−4.3777

0.000541

X₃*X₄

−0.008

0.00063

−12.2135

0.000000^a