这组数的平均数和众数各是多少?--------------------------------------------------------------------------------------l 领口尺寸/cm l 38 l 39 l 40 l 41 l 42 l--------------------------------------------------------------------------------------l 件数 l 12 l 19 l 31 l 15 l 18 l--------------------------------------------------------------------------------------
问题描述:
这组数的平均数和众数各是多少?
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l 领口尺寸/cm l 38 l 39 l 40 l 41 l 42 l
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l 件数 l 12 l 19 l 31 l 15 l 18 l
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答