When should simple random sampling, systematic sampling and stratified sampling be used in senior high school mathematics? Thank you
The advantage of random number table method is to ensure the same probability of each number, but the disadvantage is that the workload is large. Isometric sampling, also known as mechanical sampling, systematic sampling, SYS sampling and interval sampling, has the main advantages of simplicity. When you have a certain understanding of the overall structure, you can make full use of the existing information to queue the whole unit before sampling, which can improve the sampling efficiency. The biggest disadvantage of using equidistant sampling method lies in the arrangement of the whole unit. Some general units may contain hidden tables or "unqualified samples", and investigators may neglect to select them as samples. Compared with simple random sampling, stratified sampling has higher accuracy and more convenient organization and management, and can ensure that individuals are extracted at every level in the group. In this way, not only the parameter value of the whole population can be estimated, but also the situation of each layer can be estimated separately, so stratified sampling technology is often used. Disadvantages don't seem to matter. ...