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在教学过程中,发现学生对事件独立性的理解存在误区,主要表现在2个方面:一是把条件概率中的相乘关系误认为是独立关系中的相乘关系;二是当2个事件发生的概率为定值时误认为是独立关系.面对第2个误区,笔者引用课堂实录阐明问题,愿给读者在教学中提供有用素材.1条件关系下概率为定值的事件独立性分析组织学生学业水平考试复习之际,笔者在批阅
In the teaching process, students are misunderstood in their understanding of the independence of events. They are mainly manifested in two aspects: one is that the multiplicative relation in conditional probability is mistakenly considered as the multiplicative relation in independent relations; the second is when two events occur. When the probability of occurrence is a fixed value, it is misunderstood as an independent relationship. Faced with the second misunderstanding, the author quotes the classroom record to clarify the problem and is willing to provide readers with useful materials in teaching. 1 The independence of events with fixed probability under conditional relationship analysis When reviewing the student’s academic proficiency test, the author is reviewing