This paper studies the main techniques of measuring non-sampling error and classifies them into two classes: based on designs and based on models.

本文研究了国内外非抽样误差测度的主要方法，将其分为两类：基于设计的方法和基于模型的方法。

youdao

The sampling error for questions posed to non-Catholics was plus or minus 4 percentage points.

CNN: Poll: U.S. Catholics would support changes