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知识展台1.定义:一组数据的总和除以这组数据个数所得到的商叫这组数据的平均数.2.求法:用所有数据相加的总和除以数据的个数,需要计算才得求出..3.个数不同:在一组数据中,平均数具有惟一性.4.呈现不同:平均数是一个“虚拟”的数,是通过计算得到的,它不是数据中的原始数据.5.代表不同:平均数反映了一组数据的平均大小,常用来代表数据的总体“平均水平”.6.特点:平均数与每一个数据都有关,其中任何数据的变动都会相应引起平均数的变动.主要缺点是易受
Knowledge Booth 1. Definition: The sum of a set of data divided by the number of sets of data obtained by the quotient of the average value of this set of data .2. Calculation: Summation of all data divided by the total number of data needs to be calculated You have to find.3.3 different number: in a group of data, the average is unique.4.Different presentation: the average is a “virtual ” number is calculated, it is not the data In the original data .5 different representations: the average reflects the average size of a group of data, commonly used to represent the overall data “average” 6. Characteristics: the average number of each and every data, any of which data The corresponding change will cause the average change. The main disadvantage is susceptible