考点1:随机抽样考纲解读1理解随机抽样的必要性和重要性;2会用简单随机抽样方法从总体中抽取样本,了解分层抽样和系统抽样方法.命题走向随机抽样包含简单随机抽样、系统抽样和分层抽样,它们的共同特征是每个个体被抽到的概率相等.此类题常以选择题或填空题的形式呈现,主要的考查类型有:1对生活中的事例判断应采用哪种抽样方法;2求系统抽样抽取的样本编 Test Point 1: Random sampling Explanatory Notes 1 Understand the necessity and importance of random sampling; 2 will use a simple random sampling method to extract samples from the population to understand the stratified sampling and systematic sampling method Proposition to random sampling including simple random sampling, the system Sampling and stratified sampling, and their common feature is that each individual is equally likely to be drawn.This type of questions often appear in the form of multiple choice questions or fill in the blank, the main types of tests are: 1 cases of life should be used to judge What kind of sampling method; 2 to find the sample system sampling