查询词典 sampling methods

The qualitative methods employed in this study included pretest and posttest, concept map, interview and learning journal. Twelve students were chosen by a purposive sampling method from the class. According to their Raven's Standard Progressive Matrices Testresults, the students were classified into low level of 3, medium level of 6 and high level of 3 with even number of gender. They were interviewed individually about the teaching activities designed by the researcher for this study. The findings were summarized as follows

本研究先采方便取样，选取台北市内湖某国小五年级27位学童为研究对象，进行资料搜集与分析，另采立意取样，依据瑞文氏测验(Raven's Standard Progressive Matrices Test，以下简称SPM)，选取低推理能力3人，中推理能力6人，高推理能力3人，共计12人，男女各半；利用CMDA、前后测以及一对一多次的诊断性晤谈，深入分析 12名访谈对象在教学前、后，对「物质与热」单元的概念学习历程。

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。

Methods Cluster sampling was used to investigate general growth situation of the children at 6～13 years of Zhuang and Han nationalities. Their body height, sitting height, body weight and chest circumference were measured.

采用整群抽样方法，以广西移民安置区6～13岁壮族、汉族儿童为调查对象，对儿童进行身高、坐高、体重、胸围测量，家长完成儿童生长发育影响因素问卷调查。

Methods Collecting basic information of 67 community health service institutions applying method of self-filling questionnaire sampling, inputting data with Epidata 3.02, analyzing with EXCEL.

方法采用自填式问卷抽查的方法，收集67家社区健康服务机构基本资料，采用Epidata3.02建立数据库并录入数据，用Excel进行分析。

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。

Based on Iwao's method, the formula of optimum theortical sampling number was established. By using methods for variance analysis, the number of B. tabaci eggs showed little difference on the upper, middle, and lower canopy of L.

应用Iwao的抽样模型，建立了烟粉虱卵的田间理论抽样数公式方差分析表明，烟粉虱卵在女贞树冠上层、中层、下层的分布数量差异不显著。

Based on Iwao's method, the formula of optimum theortical sampling number was established. By using methods for variance analysis, the number of B. tabaci eggs showed little difference on the upper, middle, and lower canopy of L.

应用Iwao的抽样模型，建立了烟粉虱卵的田间理论抽样数公式方差分析表明，烟粉虱卵在女贞树冠上层、中层、下层的分布数童差异不显著。

Methods A crosssectional survey was conducted among 713 students from a secondary vocational school in Hefei by using cluster sampling method.

采用整群抽样方法在合肥市某中专学校对713名学生进行问卷调查。

The sampling cultivations were applied before and after sterilization to compare the effects of the two methods.

第2阶段：入选含氯消毒剂浸泡处理后细菌培养符合国家标准要求的雾化吸入器，再分两组分别采用原包装袋、无菌治疗巾进行保存，两组均在保存1、2、3 d后采样做细菌培养，比较两种方法的保存效果。

Methods With random cluster sampling, a total of 196 parents were chosen from rural communities in district of Xi'an city.

采用整群随机抽样的方法，在西安市农村社区的 4个乡抽取 10个村 196名小儿喂养人进行现场问卷调查，采用SPSS10 。0软件包进行统计分析。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。