In foreign country, language census generally was a part of census, and survey sampling always used smaller samples.

国外的语言普查一般是结合人口普查进行的，抽样调查的规模也不大。

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This paper gives a definition to the survey of language situation, an outline of language census and survey sampling at home and abroad.

文章论述了语言文字使用情况调查的含义，介绍了本世纪以来国内、外语言普查和抽样调查的一些重要情况。

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Gallup was an American statistician who invented the Gallup Poll, a successful statistical method of survey sampling for measuring public opinion.

这位美国的统计学家是盖洛普民意测验的首创者。盖洛普民意测验是为了测量民意对其调查样本进行统计的科学方法。

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The survey's sampling error is plus or minus 3 percentage points for the overall sample.

CNN: Obama seeks revisions to Afghanistan plans, sources say

The survey had a sampling error of plus or minus 3.1 percentage points.

CNN: Analysts pore over 'ambiguous' Iran results

The survey's sampling error is plus or minus 3 percentage points.

CNN: Poll: Most favor bipartisanship; Democrats, not so much