分层

Methods With stratified clustered sampling method, 375 college students were chosen to complete the questionnaire.

采用分层随机抽样方法，在杭州市的大学中抽取大学生375名进行问卷调查。

Methods Study subjects were selected through stratified sampling and data were collected through questionnaire and physical examination.

方法］采用分层整群抽样的方法获取研究样本，采用问卷调查和体检相结合的方法收集相关信息。

Methods Based on stratified sampling, 363 medical facilities were selected to conduct the survey.

采取分层抽样方法在全国范围内抽取363家医疗机构开展调查。

Methods (1) Randomized stratified clustered sampling method was used.

(1)采用分层整群随机抽样法，收集徐州市

Methods A self-developed questionnaire was used to investigate 2600 old persons selected in 26 provinces by stratified sampling.

方法在26省按照城乡和男女分层抽样，对2600名老年人进行问卷调查，并对有效的2414份问卷进行数据统计学处理。

Stratified random sampling was used to recruit 553 participants, and response rate was 70.5%.

取样方式为分层随机抽样，共发出553份，回收390份，回收率70.5%。

In this paper, 236 SMEs of different types of ownership and from different industries are investigated using a stratified sampling method.

本文采用分层抽样方法，对236家不同所有制、具有行业代表性的中小企业展开了问卷调查。

The fault feature parameters are extracted,subjection functions and fuzzy rules for identifying pattern of fault and selecting phase of fault are developed from perspective of fuzzy pattern recognition,and new algorithm of speedy comprehensive faulty phase selection based on stratified fuzzy reasoning is presented.

提取了用于故障选相的特征参数，从模糊模式识别的角度，制定了识别故障类型和故障相别的隶属函数及模糊规则，提出了基于分层模糊推理的快速综合故障选相元件新算法。

The sampling population of this study is girls at five-year, two-year, four-year and two-year technology of a selected college of commerce in Taipei City in stratified random sampling selection with class as sampling unit. A total of 424 girls are included in the formal survey and 405 valid questionnaires collected.

本研究以国立台北市某技术学院在学日间部五专、二专、四技、二技等学制女学生为抽样母群，采分层随机丛集取样方式，以班级为取样单位，正式施测时共抽取424人，有效问卷405份。

The market for luxury goods and services is highly stratified.

奢侈品与服务的市场是高度分层的。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。