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the quota sample | |||
proportional sampling | |||
quota sampling | |||
proportional allocation of the sample | |||
proportionate sampling |
按 比例抽样 : 7 phrases in 6 subjects |
Desert science | 1 |
Economy | 1 |
Laboratory equipment | 1 |
Quality control and standards | 1 |
Statistics | 2 |
Technology | 1 |