一、问题的提出平均数是统计中的一个重要概念,它是描述数据集中程度的一个统计量,我们既可以用它来反映一组数据的一般情况,也可以用它进行不同组数据的比较,以看出组与组之间的差别。平均数是一个“虚拟”的数,因此在本节课的教学中,我从学生们喜爱的春季运动会入手,设计以春节运动会情境为主线,贯穿本节 First, the question raised The average is an important concept in statistics, it is a statistical description of the degree of data concentration, we can use it to reflect the general situation of a set of data, you can also use it for different sets of data comparison To see the difference between groups. The average is a “virtual ” number, so in this lesson teaching, I start from the students favorite spring games, the design of the Spring Festival Games situation as the main line throughout this section