The differences between the three statistical graphs in primary school

The differences between the three types of statistical charts in primary schools are as follows:

There are three types of statistical charts in primary schools, namely bar charts, line charts and fan charts. Bar chart: You can clearly see the quantity. Line chart: You can clearly see the magnitude of quantitative changes. Fan chart: The quantity cannot be obtained directly from the chart, but the percentage of each part to the total can be clearly seen.

General steps for making a bar chart:

1. Draw two mutually perpendicular rays according to the size of the drawing.

2. On the horizontal ray, appropriately allocate the positions of the bars and determine the width and spacing of the straight lines.

3. On the deep line perpendicular to the horizontal ray, determine how much the unit length represents based on the specific conditions of the data size.

4. Draw straight bars of different lengths according to the size of the data, and indicate the number.

How to draw a weather statistics table is as follows:

1. Use a ruler to draw the table, usually four vertical grids.

2. Then fill in the "date", "weather", "highest temperature" and "lowest temperature" in order.

3. The subsequent horizontal grid will be based on the number of days to be recorded. Generally, several grids will be drawn for several days.

4. The thermometer is hung in a relatively open location outdoors, and the temperature value should be read with a horizontal gaze to reduce reading errors.

5. In the last week, record the temperature values ​​at the same time every day, draw a coordinate system, the horizontal axis represents time, the vertical axis represents temperature, draw points and connect lines.

For the weather record sheet, you can download the template from the Internet and print it out, or if the teacher requires you to draw it yourself, just use a ruler and a triangle to make the drawing.

Weather forecast (measurement) or meteorological forecast (measurement) is the use of modern science and technology to predict the state of the earth's atmosphere at a certain location in the future. Since prehistoric times, humans have begun to predict the weather to arrange their work and life accordingly (such as agricultural production, military operations, etc.).

Today's weather forecasting mainly uses collecting large amounts of data (temperature, humidity, wind direction and speed, air pressure, etc.) and then using current understanding of atmospheric processes (meteorology) to determine future air changes. Because of the chaos of atmospheric processes and because today's science does not finally have a thorough understanding of atmospheric processes, weather forecasts will always have a certain amount of error.

Statistical charts learned in primary school are: bar charts and line charts. Bar charts are divided into: single bar chart and compound bar chart. Line chart is divided into: single line chart and compound line chart.

Characteristics of common statistical charts:

1. Characteristics of bar chart statistical charts: It allows people to see the size of each data at a glance. Easily compare differences between data. Can clearly express the quantity.

2. Characteristics of the sector chart: The area of ​​the sector is used to represent the percentage of the part in the whole. Easily display the size of each set of data relative to the total.

3. Characteristics of line statistical charts: It can display the changing trends of data and reflect the changes in things.