The application of sample survey method in history research is analyzed.
方法：对项目点北碚区进行抽样调查。
Note:The data in this table is estimated by the Population Sample Survey.
注：本表为人口变动情况抽样调查推算数。
The study took a sample survey and focus group interviews combination of empirical research.
本课题采取抽样调查和焦点小组访谈相结合的方法进行实证研究。
The survey used a random sample of two thousand people across the Midwest.
这项调查使用的是对中西部地区2000人的随机取样。
One weakness of the survey was the small size of the sample.
这项调查的一个缺点就是样本的范围太小。
"This survey sample is very large, and valid, " said Hausner.
豪斯那说，“这个调查样本是非常大的，是有效的。”
"This survey sample is very large, and valid, " said Hausner.
豪斯那说，“这个调查样本是非常大的，是有效的。”
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