Table 4 Summary of ANCOVA analyses.
From: Field-Observed Cracking of Paired Lightweight and Normalweight Concrete Bridge Decks
Source | df | Adjusted sum of squares | Adjusted mean square | F-value | p value |
|---|---|---|---|---|---|
Analysis of covariance for transverse cracking | |||||
 Age | 1 | 0.01007 | 0.01007 | 0.015 | 0.707 |
 ADT | 1 | 0.45093 | 0.45093 | 6.77 | 0.029 |
 Region | 2 | 0.64760 | 0.32380 | 4.86 | 0.037 |
 Deck type | 1 | 0.09684 | 0.09684 | 1.45 | 0.259 |
 Girder type | 1 | 0.06124 | 0.06124 | 0.92 | 0.363 |
 Error | 9 | 0.59949 | 0.06661 |  |  |
 Total | 15 | 1.92792 |  |  |  |
Analysis of covariance for longitudinal cracking | |||||
 Age | 1 | 0.004201 | 0.004201 | 0.07 | 0.795 |
 ADT | 1 | 0.000038 | 0.000038 | 0.00 | 0.980 |
 Region | 2 | 0.117831 | 0.058916 | 1.01 | 0.403 |
 Deck type | 1 | 0.041457 | 0.041457 | 0.71 | 0.422 |
 Girder type | 1 | 0.128559 | 0.128559 | 2.20 | 0.172 |
 Error | 9 | 0.526219 | 0.058469 |  |  |
 Total | 15 | 0.721801 |  |  |  |
Analysis of covariance for pattern cracking | |||||
 Age | 1 | 0.09417 | 0.094167 | 0.96 | 0.352 |
 ADT | 1 | 0.00001 | 0.000007 | 0.00 | 0.993 |
 Region | 2 | 0.48023 | 0.240114 | 2.46 | 0.141 |
 Deck type | 1 | 0.04134 | 0.041338 | 0.42 | 0.531 |
 Girder type | 1 | 0.15677 | 0.156769 | 1.61 | 0.237 |
 Error | 9 | 0.87845 | 0.097605 |  |  |
 Total | 15 | 2.35301 |  |  |  |