分层抽样

Methods: People (age 18～69) from the six national minorities were investigated through sam- pling by adopting current sociology, anthropology, the method of delaminating cluster sampling in statisti- cal method and the test system on scientific literacy made by the scientific associa...

采用国际通用的社会学、人类学和统计学方法分层整群抽样方法和中国科协制定的科学素养测试体系和问卷模式，对布依族、苗族、侗族、水族、瑶族和毛南族6种少数民族18～69岁成年人进行抽样调查。

Methods By method of stratified random cluster sampling, a total of 1822 children and adolescents of Tibetan, hang and Han nationalities were recruited in A-ba area in Sichuan. Their finds height, sitting- height, knee-height and forearm length were measured. Growth and development of bone were analyzed.

采用分层随机整群抽样的方法，测量四川省阿坝州7~18岁藏、汉、羌族1822名男女儿童少年的身高、坐高、前臂长和膝高4项指标，并对其骨骼生长发育状况进行比较分析。

The results can be used as a reference for the development of a death education course as well as the creation of a death attitude scale for medical school students.

本研究以个人建构理论为基础，采用三角比较法，对36 名分层随机抽样产生的研究对象进行半结构式的访谈。

Methods The inquiry field test and grade random sampling were emplyed on a group of people naturally selected in Shanxi Province.

在陕南、陕北和关中采用分层整群抽样方法，对抽中的村自然人群进行调查，分病种进行病原学检查，并进行统计分析。

Abstract］ Objective To investigate whether there is difference of blood pressure between left and right arms in order to provide the reference materials for clinical blood pressure measurement.Methods Two hundred university students were recruited in this study by randomly sampling in different layers.Using both mercury manometer and electronic manometer at the same time,the blood pressure of both arms was measured when the student was sitting by the researcher with standard measuring methods.

目的 调查学生双上肢肱动脉血压有无差异，临床血压测量提供参考资料方法采用分层随机抽样法抽得在校大学生共200人，按标准方法固定专人分别用汞柱台式血压计和臂式电子血压计测量坐位的双上肢血压。

If you are unfortunate enough to the lovelorn, please tell me, I will help you out, really, please contact me!

如果你不幸失恋了，请告诉我，我会帮助你摆脱困境，真的，请联系我啦！

China's plan to cut energy intensity by 20 percent and pollutant discharges by 10 percent between 2006 and 2010 is a case in point.

中国计划在2006年到2010间降低20%的能源强度和减少10%的主要污染物排放，就是一个这样的例子。