| |||
| 无条件限制的随意抽样 | |||
|
sampling unrestricted random : 9 phrases in 7 subjects |
| Economics | 1 |
| International trade | 2 |
| Marketing | 1 |
| Oil / petroleum | 1 |
| Space | 1 |
| Statistics | 2 |
| Technology | 1 |
| |||
| 无条件限制的随意抽样 | |||
|
sampling unrestricted random : 9 phrases in 7 subjects |
| Economics | 1 |
| International trade | 2 |
| Marketing | 1 |
| Oil / petroleum | 1 |
| Space | 1 |
| Statistics | 2 |
| Technology | 1 |