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.
约翰评定评估信赖过度风险为10%。他选择了60个抽样单位为样本，而且考试中没有发现任何偏差。
John determined that the acceptable risk of assessing control risk too low is 10%. He selected a sample of 60 sampling units and tested without any deviation found.
约翰评定评估信赖过度风险为10%。他选择了60个抽样单位为样本，而且考试中没有发现任何偏差。
John determined that the acceptable risk of assessing control risk too low is 10%. He selected a sample of 60 sampling units and tested without any deviation found.
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