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- stratified multistage sampling 分层多级抽样
- Methods In four districts of Suzhou, 3361 persons above 16 years old were investigated by face to face adopting questionnaires using stratified multistage random sampling. 方法采用多阶段分层随机抽样方法,对苏州市4个城区的3361名16岁以上的常住人口进行面访式问卷调查。
- Methods A stratified multistage random sampling method was used to select 844 children born in 1997 from 120 villages in 89 county-level cities,counties and districts. 方法采用分层多阶段随机抽样方法,调查了广东省89个市(县、区)的120个村(居委会)的844名1997年出生儿童的免疫状况。
- stratified multistage cluster sampling 分层多级整群抽样
- Multistage sampling in forest inventory is not restricted to fixed-area sampling units. 森林资源清查中,多阶抽样并不局限于固定面积的抽样单元。
- Methods: 2807 subjects were randomly selected from four districts in Anshan by multistage sampling method. 方法采用多级抽样方法对鞍山市4个区共2807名居民过去1a中的伤害情况进行回顾性调查。
- Methods A total of 550 students in 4 junior schools were sampled with multistage sampling and surveyed. 方法通过多级随机抽样抽取济南市4所初中550名初一学生,采用问卷调查。
- Methods Using the method of multistage stratified sampling,1253 wrinkly and elderly people were investigated with the questionnaire. 方法采用多阶段分层抽样方法,对1253名中老年人进行问卷调查。
- Methods Stratified chester random sampling. 方法采用分层整群随机抽样的调查方法。
- 2807 subjects were randomly selected from four districts in Anshan by multistage sampling method. 方法采用多级抽样方法对鞍山市4个区共2807名居民过去1a中的伤害情况进行回顾性调查。
- multistage sampling in forest inventory is not restricted to fixed-area sampling units 森林资源清查中,多阶抽样并不局限于固定面积的抽样单元。
- DESIGN:A stratified randomized cluster sampling survey. 设计:分层随机整群抽样调查。
- This would be an example of a stratified sample. 这就是一个典型抽样的例子。
- Feudal society was rigidly stratified. 封建社会等级森严。
- I spent a few days sampling the literature of social science. 我花了几天时间浏览有关社会科学的文献。
- A multistage rocket projects missiles into space. 多段式火箭把导弹发射至空中。
- Design of Multistage Power Amplifier in Ku Band. Ku波段多级功率放大器的研制。
- DESIGN: Clustering stratified random sampling, cross-sectional survey. 设计:整群分层随机抽样,横断面调查。
- Thickly cornified stratified squamous epithelium. 掌皮(厚的角化复层扁平上皮)。
- This paper studies a multistage survival model. 分阶段生存模型的均衡保费计算。