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一、调查的两种方式统计调查是收集数据的常用方式,分为全面调查和抽样调查.在调查活动中,我们把考察全体对象的调查叫做全面调查.从总体中只抽取一部分对象进行调查,然后根据调查数据推断全体对象的情况,我们把这种调查叫做抽样调查.全面调查的结果比较精确,但要花费大量的人力、物力和时间,且有些调查没有必要进行全面调查,有些调查不可能进行全面调查.抽样调查
First, the two ways of investigation Statistical survey is a common way to collect data, divided into a comprehensive survey and sample surveys.In the investigation activities, we investigate the investigation of all the subjects called a comprehensive survey.From the overall survey, only part of the object drawn, And then infer the situation of all the subjects according to the survey data, we call this survey a sample survey. The results of the comprehensive survey are more accurate, but it takes a lot of manpower, material and time, and some surveys do not need to conduct a comprehensive survey. Conduct a full investigation