38.12,38.23,38.18,38.27相加/4=38.2
個別-/4
0.08+0.03+0.02+0.07/4=0.05
42. 分析某鐵礦中含鐵量的百分率共四次,得到測量值分別為:38.12,38.2..-阿摩線上測驗
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