What are the three common methods of collecting data?

1, interview survey: interview survey, also known as dispatch survey, is a survey method in which investigators and respondents get the information they need through face-to-face conversation.

2. Mailing survey: Mailing survey is a survey method in which questionnaires are sent to the respondents by mail or other means, filled in by the respondents, and then sent back or delivered to designated collection points.

3. Telephone survey: Telephone survey is a survey method in which investigators communicate with respondents by telephone to obtain information. The advantages of telephone survey are fast aging and low cost; The disadvantage is that the number of survey questions should not be too large.

Extended data:

To collect data:

1, determine the target of data analysis.

Data analysis without goals is really not good. With a clear goal orientation, the scope and starting point of data collection will be relatively clear. In practical work, problems are generally encountered. When problems need to be solved, the proposed solutions can become the object of data analysis.

2. Analyze what data needs to be collected.

After defining the goal of data analysis, you need to determine which data to collect for analysis. The goal can tell us the scope, such as which pages will be involved in the operation scenario of canceling the order; Further, it is necessary to confirm which form data, operation buttons and page jumps on these pages need to record operation events.

Consider the cost of each data collection point.

Data embedding has a cost, and the most intuitive thing is that it will have a great impact on performance. At present, there are some acquisition technologies without embedded points, and I have not done corresponding research. Here I only explain what needs to be embedded.

Baidu Encyclopedia-Statistics