What are the statistical data collection methods?

Statistical data collection methods: direct observation method, interview method (divided into face-to-face interview method, telephone method and self-filling method), communication method, network survey method and satellite remote sensing method.

1, direct observation method

The method by which investigators go to the scene to observe, measure and register the investigated object to obtain information. Investigators do not control or interfere with observed events or behaviors, and can obtain information without the knowledge of the respondents.

2. Interview method

Face-to-face interview: personal in-depth interview.

Only one respondent takes part in the survey on special questions at a time.

Suitable for more secret issues, such as personal privacy issues; Or more sensitive issues.

Interview style

Interview: symposium

Group interview, also known as group interview, is to gather a group of respondents at the investigation site and let them express their opinions on the subject of the investigation to obtain information.

The number of people attending the forum should not be too large, generally 6 ~ 10.

Telephone type

According to the survey outline (questionnaire), investigators obtain information by telephone question and answer.

Fast aging, low cost and wide coverage; However, the time of each survey should not be too long, and the refusal rate is high.

AutoFill

A data collection method in which an investigator gives a questionnaire or questionnaire to the respondent in person, fills it out and returns it in person. The recovery rate is high, but it takes time and effort.

3. Communication method

The organizer of the survey (such as the government statistics department) sends the questionnaire or questionnaire to the respondents by mail or electronic means, fills it out and sends it back, which is also called mailing questionnaire survey.

The survey object is not limited by space area, and the survey cost is low; But the speed is slow and the recovery rate is low.

4. Network survey method

Methods of understanding and mastering information through Internet, computer communication and digital interactive media.

It is voluntary, directional, timely, interactive, economical and anonymous.

Common methods: online questionnaire survey, online communication survey, online observation, online experiment, etc.

5. Satellite remote sensing method

A method for estimating agricultural yield by using high-resolution satellite photos to provide green information of ground crops.