The difference between three kinds of statistical charts in primary schools

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

There are three kinds of statistics in primary schools: bar statistics, broken line statistics and fan statistics. Bar chart: You can clearly see the quantity. Broken line statistical chart: you can clearly see the magnitude of quantitative change. Department chart: You can't get the figures directly from the chart, but you can clearly see the percentage of each part in the total.

General steps to make a bar chart:

1, according to the drawing size, draw two vertical rays.

2, in the horizontal ray, the appropriate distribution of the position of the crossbar, determine the width and interval of the straight line.

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

4. Draw straight lines with different lengths according to the size of the data, and indicate the quantity.

How to draw the weather statistics chart is as follows:

1, draw the table with a ruler, and generally draw four vertical grids.

2. Then fill in "Date", "Weather", "Maximum Temperature" and "Minimum Temperature" in turn.

3. Subsequently, the horizontal grid should be based on the number of days to be recorded. Usually record for a few days and draw a few grids.

4. The thermometer is hung in an open place outdoors, and the temperature value should be read with horizontal eyes to reduce the reading error.

5. In the last week, record the temperature value at the same time every day and draw a coordinate system, with the horizontal axis representing time and the vertical axis representing temperature, and draw a line.

Weather records can be downloaded and printed from the internet, or teachers can draw pictures with rulers and triangles themselves.

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

Today's weather forecast mainly uses collecting a large number of data (temperature, humidity, wind direction and speed, air pressure, etc.). ), and then use the current understanding of atmospheric processes (meteorology) to determine future air changes. Because of the chaos of the atmospheric process and the fact that science has not fully understood the atmospheric process today, there will always be some errors in the weather forecast.

Statistics are learned in primary schools: bar statistics and broken line statistics. Bar charts are divided into single bar charts and composite bar charts. Broken-line statistical charts are divided into simple broken-line statistical charts and composite broken-line statistical charts.

Characteristics of commonly used statistical charts:

1, the characteristics of bar chart statistics: it can make people see the size of each data at a glance. It is easy to compare the differences between the data. Can clearly indicate the quantity.

2. Features of the fan-shaped statistical chart: the area of the fan represents the percentage of this part in the total. It is easy to display the size of each set of data relative to the total.

3. Features of the broken-line statistical chart: it can show the changing trend of data and reflect the changing situation of things.