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学好随机抽样是学习数理统计的基础和前提.如果对三种基本的抽样方法的概念理解不透彻,不能正确把握它们之间的区别与联系,就不能在实际的操作中作出正确的选择,不自觉地陷入命题人设置的各种陷阱.下面列举几类典型的陷阱进行分析.
Learning random sampling is the basis and prerequisite for learning mathematical statistics. If the concepts of the three basic sampling methods are not thoroughly understood and cannot correctly grasp the differences and connections between them, we cannot make correct choices in actual operations. Consciously caught in various traps set by the proposition. Here are some typical traps to analyze.