What Is Systematic Sampling?

The systematic sampling method, also known as the equidistant sampling method or the mechanical sampling method, is based on sampling a certain distance from the population. To extract a sample of capacity n from a population of capacity N, the population can be divided into several parts of equilibrium, and then an individual is drawn from each part according to a predetermined rule to obtain the required sampling method.

Systematic sampling

Right!

The systematic sampling method, also known as the equidistant sampling method or the mechanical sampling method, is based on sampling a certain distance from the population. To extract a sample of capacity n from a population of capacity N, the population can be divided into several parts of equilibrium, and then an individual is drawn from each part according to a predetermined rule to obtain the required sampling method.

Because the system sampling method is simple and easy to implement, it is not prone to errors, so people are happy to use it at the production site. If you regularly sample a product for inspection in a certain process, it can be regarded as an example of systematic sampling.

step:

Numbering: Number the N individuals in the whole first, sometimes you can directly use the numbers that your own individuals bring, such as student number, house number, etc.

Segmentation: Determine the segmentation interval k and segment the numbers. When N / n (n is the sample size) is an integer, take k = N / n.

Determine the first individual number: In the first paragraph, use simple random sampling to determine the first individual number l (lk).

Sample: Take a sample according to a certain rule, usually add l to the interval k to get the second individual number (l + k), add k to get the third individual number (l + 2k), and proceed in order. Until you get the entire sample.