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(1)某个数组的平均数是该组所有数据的和与数据的个数的比.(2)众数是一组数据中出现次数最多的数.一组数据中的众数可能不止一个,也可能没有.(3)中位数是指一组数据按大小顺序排列后位置居于最中间的一个数据(或最中间两个数据的平均数),一组数据的中位数是惟一的.
(1) The average of an array is the ratio of the sum of all data in the group to the number of data. (2) The mode is the number of occurrences in a group of data. The number of modes in a group of data may be more than one Or may not be. (3) The median refers to a set of data that is ranked in the middle of the data in order of magnitude (or the average of the two middlemost data), and the median of a set of data is unique. .