Average will be learned in our primary school, and it is also a common formula in mathematics. The average value is a statistical term and the most commonly used statistic in statistics, which is used to indicate the relatively concentrated central position of the observed values in the data.
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.
The average can be used to reflect the general situation and average level of a group of data, and can also be used to compare the data of different groups to see the differences between groups.
Arithmetic average is a good concentrated quantity, which has the advantages of sensitive response, strict judgment, simple solution, simple calculation, suitable for further calculation and little influence by sampling changes.
But at the same time, the arithmetic average is easily influenced by extreme data, because the average is sensitive, and the big or small change of each data will affect the final result.