调查在分层逐级抽样法与随机抽样法相结合的抽样基础完成,共收集有效样本1005个。
The survey was completed on the basis of combining stratified sampling and random sampling, collecting 1005 valid samples in total.
论文运用文献法和调查法,选取苏州市的两所高职院校为样本,通过方便抽样发放问卷。
The methods of this thesis are literature and survey. The author selected two Suzhou Vocational Colleges as a sample through convenience sampling questionnaire.
调查内容包括研究对象选择、随机化方法、盲法、组间可比性、样本大小、依从性、统计学处理、疗效评价指标、随访和不良事件观察等。
The subject choice, randomized method, blind method, intra-group comparison, sample, compliance, statistical method, therapeutic effect assessment index, survey and side effects were observed.
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