将抽样、频率分布直方图和茎叶图等统计知识与概率交汇综合命题,是考试热点,下面作一个归纳,供复习参考.一、抽样与概率交汇综合例1某车间甲组有10名工人,其中有4名女工人;乙组有5名工人,其中有3名女工人,现采用分层抽样方法(层内采用不放回简单随机抽样)从甲、乙两组中共抽取3名工人 The sampling, frequency distribution histograms and stems and leaves and other statistical knowledge and probability of intersection of comprehensive proposition, is a hot test, the following to make a summary for review reference I. Sampling and probability intersection of a comprehensive example 1 A workshop A group of 10 workers Of which there are 4 female workers. In Group B, there are 5 workers, of whom 3 are female workers. Three workers are currently being recruited from Party A and Group B by stratified sampling (using simple random sampling without replacement)