What methods are there to describe data in junior one mathematics?

Collection and arrangement of data

Collecting, sorting, describing and analyzing data is the basic process of data processing.

4. 1 What kind of animals do students like best-an example of comprehensive investigation

Data are recorded by strokes, and each stroke of the word "positive" represents a piece of data.

The survey of all subjects is a comprehensive survey.

4.2 primary and secondary school students' eyesight survey-taking sampling survey as an example

Sampling survey is a survey that takes samples from the investigated population and estimates the population according to the samples.

Statistical survey is a common method to collect data, which generally includes comprehensive survey and sampling survey, and sampling survey is often used in practice. In the process of investigation, data can be obtained in different ways. Besides questionnaires and interviews, consulting literature and experiments is also an effective way to obtain data.

Organizing data with tables can help us find the distribution law of data. Using statistical charts to represent the sorted data can reflect the data law more intuitively.

4.3 Project research survey "How do you dispose of waste batteries?"

The investigation activities mainly include the following five steps:

First, design a questionnaire.

(1) Steps to design a questionnaire

① Determine the purpose of the investigation;

(2) Select the survey object;

③ Design survey questions.

2. When designing the questionnaire, we should pay attention to:

(1) Questions cannot involve the personal opinions of the questioner;

Don't ask questions that others don't want to answer;

③ The choice answers provided should be as comprehensive as possible;

④ Ask questions concisely;