全国数据根据抽样误差和调查误差进行了修正。

The national total population was adjusted for the sampling error and investigation error.

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本文结合调查误差分析的理论，根据网络自身的特点，分析了网络调查的非抽样误差的来源，并提出了减少误差的方法。

With theory of error analyzing and characteristics of Internet, this article analyzes the non - sampling errors of Internet surveys and comes up with some steps to reduce them.

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该中心对1,600人进行了调查，误差幅度为3%。

The center polled 1, 600 people with a 3% margin of error.

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Of course that depends on the accuracy of the self- reports that people are making on their own, and as you'll see in just a minute, there are errors in that and some of you may have experienced some of that yourself in keeping the dietary records.

当然这还取决于每个人自己完成的,个体调查的准确性,正如你马上会看到的,这其中有误差,而你们也可能经历过一些,你自己保存膳食记录时的误差

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选