在一组数据中各数据与它们平均数的差的绝对值的平均数叫做这组数据的平均差它也是一个衡量一组数据波动大小的量例如数据123的平均数是 Template




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tomski在一组数据中各数据与它们平均数的差的绝对值的平均数叫做这组数据的平均差它也是一个衡量一组数据波动大小的量例如数据123的平均数是 coloring