What kinds of statistics are there?

This is a form of presenting statistical data on the basis of statistical tables, and it is also an important tool for statistical analysis. The statistical chart visualizes the numbers in the statistical table and reflects the contrast between the numbers with geometric figures. As the language of numbers, statistical charts are clearer, more concrete and more vivid than statistical tables. But graphics can only play the role of schematic diagram, and the difference between numbers is abstract. Therefore, statistical charts need to be combined with statistical tables. Statistical charts can be divided into two categories. One kind is propaganda map, which aims to popularize statistics. The main graphics used are: bar graph, square graph, circle graph, pictograph and statistical graph. The other is a chart for statistical analysis. Geometrical coordinate charts, points and lines are mainly used to reflect the development process and trend of social and economic phenomena, and to reflect the relationship between phenomena, including dynamic statistical charts and related statistical charts. 1. Concept: statistical chart: a display form that represents the quantitative relationship of statistical data by the position, elevation or size of points, lines and surfaces. 2. Basic requirements for drawing: (1) There should be a title, which is generally located at the bottom of the drawing and briefly explains the information content. (2) Bar charts, scatter charts, line charts and histograms should have horizontal and vertical axes, units and legends. (3) Pay attention to the reasonable selection of graphic types. 3. Statistical chart type (1) Bar chart: also known as bar chart, it represents the situation of independent indicators at different stages, with two or more dimensions, and the legend is located at the upper right. (2) Bar chart and pie chart: describe the size of percentage (composition ratio), and use colors or various graphs to express different proportions. (3) Line chart: The rise and fall of lines are used to indicate the development trend of things, which is mainly used to measure data and describe the relationship between two variables. (4) Semi-logarithmic line graph: the vertical axis uses logarithmic scale to describe the changing speed and trend of a group of continuous data. (5) Histogram: Describe the frequency distribution of the measured data. (6) Scatter chart: Describe the correlation between the two phenomena. (7) Statistical chart: Describe the geographical distribution of a phenomenon.