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关注：1
2013-05-23 12:21
求翻译：以北京市某中学12-15岁学生研究对象，采用分层随机抽样的方法抽取男生60人、女生83人。是什么意思？ 待解决
 悬赏分：1
- 离问题结束还有
以北京市某中学12-15岁学生研究对象，采用分层随机抽样的方法抽取男生60人、女生83人。
问题补充： |
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2013-05-23 12:21:38
Study of 12-15 year-old students in a middle school in Beijing, using stratified random sampling method to extract boys 60 and girls 83.
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2013-05-23 12:23:18
A Middle School in Beijing 12 - 15-year-old students in research on the subject, and the stratified random sampling methods 60 boys, 83 girls.
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2013-05-23 12:24:58
North of the capital city some middle school 12-15 year old student object of study, uses the lamination random sampling the method to extract the male student 60 person of, the female student 83 people.
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2013-05-23 12:26:38
Students in a middle school 12-15 study in Beijing, using stratified random sampling methods extract 60 boys and girls 83 people.
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2013-05-23 12:28:18
正在翻译，请等待...
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