| Vessel characteristics | Transformation |
| Sum of squares | d.f. | Mean squares | F |
| Length (m) | - | Among groups | 15,645.24 | 15 | 1043.02 | 315.37*** |
| Within groups | 47,089.49 | 14,238 | 3.31 |
| ||
| Total | 62,734.73 | 14,253 |
|
| ||
| Engine power (kW) | - | Among groups | 1,796,675.25 | 15 | 119,778.35 | 105.91*** |
| Within groups | 16,102,276.83 | 14,238 | 1130.94 |
| ||
| Total | 17,898,952.08 | 14,253 |
|
| ||
| Tonnage (GT) | ln(x + 1) | Among groups | 56,611.49 | 15 | 3774.10 | 152.42*** |
| Within groups | 352,543.27 | 14,238 | 24.76 |
| ||
| Total | 409,154.76 | 14,253 |
|
| ||
| Crewmembers | ln(x + 1)
| Among groups | 2520.76 | 15 | 168.05 | 230.58*** |
| Within groups | 10,022.15 | 13,751 | 0.73 |
| ||
| Total | 12,542.91 | 13,766 |
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