According to the original data. Six, mathematical data processing data grouping standards based on the original data. Data grouping is to divide the original data into different groups according to certain standards according to the needs of statistical research, and the grouped data is called grouped data. There are two methods of data grouping: single variable value grouping and group spacing grouping. The main purpose of data grouping is to observe the distribution characteristics of data, and then calculate the frequency of data in each group after data grouping, thus forming a frequency distribution table.