Table 10. Post hoc analysis on the service flexibility
| Items | 15 | 16 | 18 | 19 |
| Carriers (146) | Average | 4.67 | 4.26 | 4.38 | 4.63 |
| SD | 1.308 | 1.198 | 1.158 | 1.180 |
| Shippers (190) | Average | 4.25 | 4.41 | 4.34 | 4.79 |
| SD | 1.251 | 1.247 | 1.075 | 1.097 |
| ANOVA (F) | p=0.003 (8.881) | p=0.266 (1.240) | p=0.703 (0.146) | p=0.230 (1.630) |
SD, standard deviation; ANOVA, analysis of variance.