查询词典 systematic sampling

The recommended sample size for a systematic random sampling is 500 children.

系统随机抽样的推荐样本大小是500名儿童。

A systematic procedure for sampling subject matter should be described and used.

应当利用并详述对内容抽样的系统化程序。

With the methods of systematic and random sampling, the 39 grasshopper species and more than 3000 specimens had been collected in 5 kinds of habitats, belonging to 5 families, 26 genera.

采用系统取样和随机取样相结合的方法调查了5种生境中蝗虫的种类和数量，共采集到蝗虫39种，标本3000余号，隶属于5科26属。

It had good reliability and validity. Using systematic random sampling techniques, we sampled normal sample group (N = 1103) from Shandong province.

本部分还对一我国城市居民主观幸福感的构成成分进行了实证的探索，探索性因素分析和验证性因素分析的结果，支持了第一部分提出的有关假定。

To undertake a systematic random sampling, one needs to know the total number of households, the average number of children under 5 years of age in a household, and the total population.

要进行一次系统随机抽样，必需知道该人群中的家庭总数，每户家庭5岁以下儿童的平均数，以及总人口。

Methods Questionaires were gotten by 1/10 systematic random sampling in age 20 and elder than 20 in an urban community of Jinan.

1995年国际糖尿病联盟在世界糖尿病日提出的口号是"尽量减少因对糖尿病无知而付出的代价。"

All subjects in the sample of 600 individuals were selected by a stratified systematic random sampling method and interviewed by trained interviewers.

本研究采横断面研究方法，以苗栗县所有65岁以上老年人作为研究母群体，采分层随机抽样的方法，共得到600位样本，其中男性302人，女性298人。

This survey adopted a stratified, three stage, systematic random sampling method.

从十九所大学院校中抽出1，600人，然后采个别面访方式进行，共访问成功1，436人。

Using systematic grid sampling method and geostatistics, the spatial heterogeneity of land use intensity change in Guanxian county from 1990 to 2000 was studied in this paper.

以山东省冠县为研究区域，采用系统网格采样法获取研究样本，以地统计学方法探讨了冠县1990~2000年土地利用强度变化的空间异质性。

With the methods of systematic and random sampling, more than 2000 specimens were collected in 7 kinds of habitat, belonging to 3 superfamilies, 11 families, 30 genera and 48 species. Of the collected specimens, grasshopper has the most species accounting for 62.5% of the total species.

采用系统取样和随机取样相结合的方法调查了7种生境中直翅目昆虫的种类和数量，共采集到昆虫48种，标本2000余号，其中蝗虫类30种，蚱类6种，螽斯类12种，隶属于3总科，11科，30属。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。