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调查背景与方法本调查采用多阶段整群抽样方法对三地大学生进行了手机使用情况调查,调查执行时间是2009年12月24日到2010年1月15日。本调查在北京地区抽取了中国人民大学、清华大学、北京师范大学、北京邮电大学、北京物资学院和北京劳动关系学院六所高校,针对北京地区大学生对3G终端及服务的使用情况采用整体抽样法以班为单位进行了问卷调查,共收回有效样本812份。样本构成如下:
Survey Background and Methods The survey conducted a survey of mobile phone usage among students from three places using the multistage cluster sampling method. The investigation was conducted from December 24, 2009 to January 15, 2010. The survey draws six colleges and universities including Renmin University of China, Tsinghua University, Beijing Normal University, Beijing University of Posts and Telecommunications, Beijing Institute of Material Science and Beijing Institute of Labor Relations in Beijing area. According to the sample survey of university students in Beijing using 3G sampling method A questionnaire survey was conducted on the basis of classes and 812 valid samples were collected. The sample is structured as follows: