一、知识点归纳通常,平均数反映一组数据的总体情况要比中位数、众数更可靠.计算平均数,需要让整组数据中的每一个数据都加人计算.因此,在数据有缺失的情况下,无法准确计算平均数.此外,计算平均数的工作量也较大.平均数受极端数据的影响,也受每个数据的影响.中位数是描述数据的另一种指标.如果 First, the knowledge point induction In general, the average reflects a group of data than the median overall, more reliable mode.Calculation of the average, you need to make the entire set of data in each of the data are added.Therefore, the data In the absence of the case, the average can not be calculated accurately, and in addition, there is also a large amount of work to be done in calculating the average, which is also affected by the extreme data, which is also affected by each of the data Indicator if