对展览会观众数据进行统计时,如果不能详细采集所有观众的数据,则必须采取抽样调查的方式,就会引入抽样准确度的问题。为了获得更可靠的结论,需要扩大抽样的样本量,从而增加抽样调查工作的成本与复杂度。本文通过统计学原理对此问题进行定量分析,从而在抽样准确度与抽样工作成本之间找出一个合适的平衡点。 Statistics on the exhibition audience data, if you can not collect all the audience data in detail, you must take a sample survey, it will introduce the issue of sampling accuracy. In order to obtain more reliable conclusions, there is a need to expand the sample size of the sample so as to increase the cost and complexity of the sample survey. This article uses statistical principles to quantitatively analyze this problem, so as to find a suitable balance between sampling accuracy and sampling work cost.