简单随机抽样是抽样方法中最基本的一种抽样方法,同学们在学习过程中,会遇到几个容易混淆的问题,下面举例说明.题一个总体有8个个体,要通过逐个抽取的方法从中抽取一个容量为4的样本,求:(1)每次抽取时各个个体被抽到的概率; Simple random sampling is the most basic sampling method in the sampling method. During the learning process, the students will encounter several easily confusing problems. Here is an example to illustrate. The problem is that there are 8 individuals in total and they must be extracted one by one. To extract a sample with a capacity of 4 from it, find: (1) the probability that each individual will be drawn at each withdrawal;