求翻译：定量研究的方法与定性研究不同，主要采用电话调查、面访式调查、邮寄问卷调查、媒体问卷调查和留置问卷调查等。电话调查是发达国家最为普遍的一种调查方式，大部分调研活动可以通过电话调查方式展开。主要优点是能在很短的时间内访问大面积地域的受访者，并且成本比较低。但是电话调查也有不足，就是不能进行较长时间的访问，一般不问比较复杂的问题，另外，如果调查牵涉到图表等问题，电话调查则不能进行。是什么意思？

The different methods of quantitative research and qualitative research, mainly using the telephone survey interviewed face to face surveys, questionnaires were mailed to media surveys and liens survey. The telephone survey is the most common in developed countries as a method of investigation, and

Quantitative research and qualitative research methods, mainly in telephone surveys, interviews, surveys, questionnaires, surveys and retention media survey questionnaire for the survey. Telephone surveys are the most common developed a method of investigation, most research activities can be carrie

The quantitative investigation method and the qualitative investigation are different, mainly uses the telephone investigation, the surface visits the type investigation, the mail questionnaire survey, the media questionnaire survey and the leaving alone questionnaire survey and so on.The telephone

Study on quantitative and qualitative research methods are different, mainly uses telephone surveys, interview surveys, mail surveys, questionnaire surveys and questionnaire survey of indwelling of the media, and so on. Telephone surveys are the most popular form of a survey developed, most research

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