Notes: | T1 means | T2 means . |
| T3 means . | T4 means . |
| T5 means . | T6 means . |
| T7 means . | T8 means . |
| T9 means . | T10 means . |
| T11 means . | T12 means . |
| T13 means . | T14 means . |
| T15 means . | T16 means . |
| T17 means . |
|
| *means the null hypothesis is rejected under 5% significance level; North Ame. = North American |