1, average, statistical term, refers to the quantity representing the trend in a set of data, which means that the sum of all data in a set of data is divided by the number of data in this set. It is an indicator reflecting the trend of data concentration. The key to solve the problem of average application is to determine the "total amount" and the total number of copies corresponding to the total amount.

2. Average is an important concept in statistics. The average in primary school mathematics generally refers to the arithmetic average, that is, the quotient obtained by dividing the sum of a set of data by the number of this set of data. In statistics, arithmetic mean is often used to represent the overall level of statistical objects, and it is a statistic that describes the position in the data set. It can be used not only to reflect the general situation and average level of a group of data, but also to compare the data of different groups and see the differences between groups.