Sampling methods What are the sampling methods?

1, draw lots. Generally speaking, the lottery method is to number the n individuals in the group, write the numbers on the digital labels, put the digital labels into a container, and after stirring evenly, extract one digital label from it every time and extract it for n times continuously to get a sample with a capacity of n. The lottery method is simple and easy, and it is suitable for the situation with a small number of people in the group. When there are a large number of individuals in the group, it is difficult to "evenly mix the group", which is probably due to the poor representativeness of the samples produced by lottery.

2. Random number method. In random sampling, another commonly used method is random number method, that is, random number table, random number dice or computer-generated random number are used for sampling.