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stratified sampling; stratified random sampling; pre-stratification | |||
stratified random sampling (法) | |||
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stratified random sampling |
分 层随机抽样 : 11 phrases in 7 subjects |
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Commerce | 1 |
Desert science | 1 |
Earth sciences | 1 |
Ecology | 1 |
Statistics | 3 |
Technology | 3 |