What are the advantages of sample surveys?

1, sampling survey can reduce the workload of the survey, the survey content can be more, more or more specialized, can ensure the integrity of the survey object.?

2, can be partially projected from the number of the overall, the use of probability theory and the principles of mathematical statistics, with a certain probability to ensure that the projected results of the degree of reliability, to play a comprehensive survey to understand the function of the overall survey, you can ensure the accuracy of the survey.

3, because the sampling survey is conducted for a part of the overall unit, sampling survey can greatly reduce the survey costs and improve the efficiency of the survey.

4, the speed of collecting and organizing data and synthesizing samples is fast, ensuring the timeliness of the survey.

Extended information

Sampling surveys are mainly used in the following areas:

(1) The nature of some of the totality of its own determines that it can not be comprehensively investigated but to fully understand the situation, such as infinite totality (the quality of continuously produced products, etc.).

(2) certain totals theoretically can be fully investigated, but in practice it is impossible and unnecessary situation, such as investigating urban residents traveling.

(3) Certain aggregates that are theoretically possible to be fully investigated but practically impossible, such as sabotage tests.

(4) some special general, requires a fairly qualified investigator can be carried out, for this reason can only be used to sample survey, such as the survey of scientific and technological aspects of the general.

(5) In order to improve the timeliness, it is required to obtain information about the overall situation in a short period of time.

(6) The principle of sampling survey can also be used to test the hypothesis of an overall to determine the truth of such hypotheses, in order to decide to take action.

Baidu Encyclopedia - Sampling Survey Method