| Trading Agents Group | N | Mean | Std. Deviation | Std. Error | 95% Confidence Interval for Mean | Min. | Max. | ||
| Lower Bound | Upper Bound | ||||||||
|
| Traders (Importers, Exporters) | 49 | 4.1733 | 0.22721 | 0.03246 | 4.1081 | 4.2386 | 3.64 | 4.63 |
| Transporters | 30 | 4.3385 | 0.20726 | 0.03784 | 4.2612 | 4.4159 | 3.96 | 4.68 | |
| Freight forwarders | 30 | 4.2954 | 0.21460 | 0.03918 | 4.2153 | 4.3755 | 3.81 | 4.64 | |
| Clearing Agents | 30 | 4.3246 | 0.18575 | 0.03391 | 4.2552 | 4.3939 | 4.01 | 4.78 | |
| Total | 139 | 4.2680 | 0.22143 | 0.01878 | 4.2308 | 4.3051 | 3.64 | 4.78 | |