平均数是“统计与概率”部分的一个重要概念,是描述数据集中程度的一个常用统计量。平均数的基本价值体现在描述和分析数据的过程之中。因此,设计相关的习题时,要紧紧抓住平均数的基本内涵,引导学生在不同的问题情境中感受平均数的意义和价值,实实在在地经历应用平均数分析和解决问题的过程,体会平均数不仅可以用来描述一组数据的整体水平,而且还是用来推断更大范围数据特征的重要依据。同时,在此过程中初步了解平均数的敏感性、区间性和局限性。 The average is an important concept in the section “Statistics and Probabilities.” It is a common statistic that describes the degree of data concentration. The basic value of the averages is reflected in the process of describing and analyzing the data. Therefore, the design of related exercises, we must firmly grasp the basic meaning of the average, to guide students in different situations to experience the meaning of the average value and value, the real experience of the application of the average number of analysis and problem solving process, experience The average can not only be used to describe the overall level of a set of data, but also an important basis for inferring the characteristics of a wider range of data. At the same time, in the process of preliminary understanding of the average sensitivity, interval and limitations.