随机事件独立性概念的引入

The Way to Introduce the Concept of the Independency of Random Events

事件的独立性是概率论中重要的概念之一。本文分析了两个随机事件相互独立的直观解释与公式形式的定义之间的关系,指出了公式形式的定义与直观解释不完全一致的情形,并通过引入三个事件相互独立的直观解释来加强学生对三个事件相互独立的定义的理解。

The independency of random events is one of the most important concepts in probability theory.The relationship between the quick look interpretation and formulaic definition of the independency between two random events is discussed.Especially,an example is given to show the discrepancy between the quick look interpretation and formulaic definition.Moreover,a quick look interpretation of the independency among three random events is given to make the definition more understandable.