比较两组测定结果的精密度。甲组:0.38%,0.38%,0.39%,0.40%,0.40%;乙组:0.37%,0.39%,0.39%,0.40%,0.41%。则

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问题 比较两组测定结果的精密度。甲组:0.38%,0.38%,0.39%,0.40%,0.40%;乙组:0.37%,0.39%,0.39%,0.40%,0.41%。则

选项 A、甲、乙两组相同
B、甲组比乙组高
C、乙组比甲组高
D、需要准确度数据才能判断
E、无法判断

答案B

解析
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