Research Article
Sodium Metasilicate Cemented Analogue Material and Its Mechanical Properties
Table 4
Orthogonal polynomial regression analysis of variance: density index.
| | The source of variance | Square and variation | Degree of freedom | Variance estimate | F-value | | Level of significance | Remarks |
| | 5.8057 × 10−2 | 1 | 5.8057 × 10−2 | 28.70 | 4 | | , 1-order term | | 2.6220 × 10−3 | 1 | 2.6220 × 10−3 | 1.30 | | | , 2-order term | | 7.9609 × 10−2 | 1 | 7.9609 × 10−2 | 39.36 | | | , 3-order term | | 9.2578 × 10−1 | 1 | 9.2578 × 10−1 | 457.67 | | | , 1-order term | | 2.3817 × 10−3 | 1 | 2.3817 × 10−3 | 1.18 | | | , 2-order term | | 2.3729 × 10−1 | 1 | 2.3729 × 10−1 | 117.31 | | | , 1-order term | | 7.4512 × 10−2 | 1 | 7.4512 × 10−2 | 36.84 | | | , 2-order term | | 2.5528 × 10−2 | 1 | 2.5528 × 10−2 | 12.62 | | | , 1-order term | | 4.7653 × 10−2 | 1 | 4.7653 × 10−2 | 23.56 | | | , 2-order term | | 7.3659 × 10−3 | 1 | 7.3659 × 10−3 | 3.64 | | | , 3-order term |
| | Error | 1.3957 × 10−2 | 69 | 2.0228 × 10−3 | | | | |
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