查询词典 cluster sampling

Methods: The investigation was made among 5204 persons of 1798 households in 3 city propers of Hebei Province by Cluster and stratified sampling method.

本次调查采用多阶段分层整群抽样的方法，共抽取了全省样本地区3个城区(分别是石家庄市长安区、唐山市路北区、张家口市桥东区)，共调查住户1798户，调查人口5204人。

The cluster random sampling method was employed to select 3 hospitals from all 5 municipal hospitals, the selected 3 hospitals were Zhuhai people hospital, Gongbei hospital, and maternal and child health care hospital.

方法采用整群随机抽样方法，在珠海市五所市级医院中随机抽取三所医院(即：珠海市人民医院、拱北医院和中医院)。

Methods Decorated houses within 6 months in Changchun were selected with the method of cluster radom sampling.

摘要摘要：目的探索室内装修空气污染的主要污染物、污染程度及对人群健康的影响。

Methods Decorated houses within 6 months in Changchun were selected with the method of cluster radom sampling.

目的 探讨室内装修空气污染的主要污染物、污染程度及对人群健康的影响。

Methods Decorated houses within 6 months in Changchun were selected with the method of cluster radom sampling.

采用随机整群抽样的方法，在长春市选择装修6个月内的住户，监测甲醛、氨和总挥发性有机物的

Methods Decorated houses within 6 months in Changchun were selected with the method of cluster radom sampling.To examine densities of formaldehyde,ammonia,total volatile organic compounds and complete questionaire.

采用随机整群抽样的方法，在长春市选择装修6个月内的住户，监测甲醛、氨和总挥发性有机物的浓度，同时进行问卷调查。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。