文章基本信息

标题：Surveys: What Does One Need to Know More About Them
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作者：Djunaidi, Harjanto
期刊名称：Journal of Food Distribution Research
印刷版ISSN：0047-245X
出版年度：2006
卷号：37
期号：SUPPL
出版社：Food Distribution Research Society
摘要：The use of surveys as a data collection method gained its popularity in recent years. However, one needs to be aware of the possibility to make measurement errors due to incorrect surveys design. The way how a question is asked and the choice the respondents have to choose from shape the sample space which in turns will affect the expected value, variance and co-variance of a random variable.