Table 2.
Source | Sum of Squares | Degree of Freedom | Prob > F a |
---|---|---|---|
Model | 22.50 | 9 | 0.0005 |
Linear | |||
X1 | 1.87 | 1 | 0.0033 |
X2 | 0.85 | 1 | 0.0614 |
X3 | 14.72 | 1 | <0.0001 |
Interaction | |||
X1X2 | 0.01 | 1 | 0.7297 |
X1X3 | 0.17 | 1 | 0.1762 |
X2X3 | 0.02 | 1 | 0.5973 |
Square | |||
X12 | 0.02 | 1 | 0.6545 |
X22 | 0.79 | 1 | 0.0188 |
X32 | 4.33 | 1 | 0.0005 |
Lack of fit | 15.20 | 3 | 0.09 |
Pure error | 0.99 | 2 | |
Total error | 16.19 | 5 |
a Prob > F: level of significance.