影响抽样误差大小有很多因素，如标志变异程度，样本单位数量的多少，抽样方式方法的选择等。
There are many factors that influence the sampling error, such as, extent of mark variation, amount of sample unit and the choice of sampling method, etc.
变异性中占比例最大的设备误差是血压计袖套的大小。
The instrument error that contributes to the greatest variability is the cuff size of the sphygmomanometer.
本文主要对这种新型传动齿轮——斜航式法向圆弧螺旋锥齿轮的误差与变异的关系和精度检测进行了较为深入的理论研究。
In this dissertation, the relationship between the errors and variations for the loxodrome normal circular-arc spiral bevel gear (LNCSBG) is deeply studied.
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