| |||
| 排气分析比例取样; 按比例取样系统 (system) | |||
| 按比例采样 | |||
| ★ 比例抽样 | |||
| 比例抽样法; 按比例抽样 | |||
| 按比例取样 | |||
| 比例取样; 比例抽样法比例采样 | |||
|
proportional sampling : 27 phrases in 11 subjects |
| Accounting | 4 |
| Business | 2 |
| Chemistry | 4 |
| Commerce | 1 |
| Demography | 1 |
| Economics | 2 |
| Electronics | 1 |
| Forestry | 3 |
| Marketing | 2 |
| Statistics | 2 |
| Technology | 5 |