| F | P ( | Significance |
Wells (w) | 0.2537 | 0.6145 | No |
Years (y) | 72.0601 | 2.2E−16 | Yes |
Bores (b) | 4870.72 | 2.2E−16 | Yes |
w+y | 0.3379 | 0.561 | No |
w+b | 39.5954 | 3.2E−10 | Yes |
y+b | 65.4259 | 6.5E−16 | Yes |
w+y+b | 1.7819 | 0.1819 | No |