| Trading Agents Group | N | Mean | Std. Deviation | 95% Confidence Interval for Mean | Min | Max | |
| Lower Bound | Upper Bound | ||||||
| Traders | 49 | 4.2129 | 0.23039 | 4.1467 | 4.2791 | 3.74 | 4.63 |
| Transporters | 30 | 4.3281 | 0.25796 | 4.2318 | 4.4245 | 3.85 | 4.79 |
| Freight Forwarders | 30 | 4.3433 | 0.19646 | 4.2700 | 4.4167 | 3.93 | 4.67 |
| Clearing Agents | 30 | 4.3131 | 0.20183 | 4.2378 | 4.3885 | 3.83 | 4.78 |
| Total | 139 | 4.2875 | 0.22864 | 4.2492 | 4.3259 | 3.74 | 4.79 |