| 1. | The regression estimator in cluster random sampling
整群抽样回归估计量 |
| 2. | Simple cluster sampling
简单整群抽样 |
| 3. | Methods a cluster sample of 499 children was randomly chosen from 6 primary schools in chongqing
方法采用随机整群抽样，对重庆市城区6所小学在读流动儿童449名进行问卷调查。 |
| 4. | This paper discusses cluster sampling and stratified cluster sampling in continuous surveys with censuses
摘要本文讨论了连续调查中应用普查方法时的整群抽样和分层整群抽样。 |
| 5. | Methods using cluster sampling , the study was conducted in a secondary technical school in hefei , and the available questionnaire were analysed
方法采用整群抽样的方法在合肥市某中专学校进行问卷调查，并对有效问卷进行统计分析。 |
| 6. | Methods : cluster sampling was introduced and the usage of antibiotics was investigated retrospectively from jan 2004 to dec 2006
方法：采用整群抽样的方法，回顾性地调查本院2004年1月2006年12月妇产科住院患者抗菌药物的使用情况。 |
| 7. | Methods 1 078 eligible subjects from different economic areas were selected by stratified cluster sampling in wuhan city and yichang country
方法采用分层整群抽样的方法分别选取武汉市城区、宜昌市农村经济水平不同的社区进行人户调查。 |
| 8. | Methods by using the cluster sampling method , a sample of 518 students drawn from 4 high schools in chuzhou , then a questionnaire survey was conducted among them
方法采取整群抽样方法对滁州市4所高中三年级毕业班学生518名进行问卷调查。 |
| 9. | Methods descriptive analysis was conducted among 818 medicos , who were sampled by stratified cluster sampling , and the model was established
方法采用分层整群抽样的方法，对某医科大学818名医学生心理健康状况的一般情况进行描述性分析，并拟合结构方程模型。 |
| 10. | Methods 4529th grade students in hefei chosen by cluster sampling were investigated by questionnaire and certain influencing factors of lung function were analyzed
方法采取整群抽样，发放问卷调查表，同时测定肺功能，并对肺功能相关影响因素进行多元线性回归分析。 |
