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【简答题】
测定某一铜合金中铜的含量,以间接碘量法 5 次平行测定的结果分别为 27.22% , 27.20% , 27.24% , 27.25% , 27.15% ,计算: ( 1 )这一组测定数据的平均值为( );(2)中位数为( ); (3)平均偏差为( ); (4)相对平均偏差为( ), (5)极差为( ); (6)相对极差为( ); (7)标准偏差为( ); (8)相对标准偏差为( ); ( 9 )若已知铜的标准含量为 27.10% ,以上测定结果的绝对误差为( ); (10)相对误差为( )。
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