有限样本空间 There are only finite outcomes. Each outcomes individually consists an elementary event. For one coin toss,there are 'tail.“Head”isan elementary event. 概率和频率是 The probability of an a specific outcome. 什么关系？ If all outcomes are equally propability of an event E can be computed as: p(E)= total number of outcomes in E total number of outcomes有限样本空间 ◼ There are only finite outcomes. ◼ Each outcomes individually consists an elementary event. ❑ For one coin toss, there are two outcomes – head and tail. “Head” is an elementary event. ◼ The probability of an elementary event corresponds a specific outcome. ◼ If all outcomes are equally likely, then the probability of an event E can be computed as: total number of outcomes total number of outcomes in | | | | ( ) E A E p E = = 概率和频率是 什么关系？