单选题
对一量块测量 4次,测得值分别为10.040mm,10.045mm,10.041mm,10.028mm,则该量块测量结果的算术平均值及其实验标准偏差为()
A、
10.039mm,0.008mm
B、
10.039mm,0.004mm
C、
10.038mm,0.008mm
D、
10.038mm,0.004mm
【正确答案】
C
【答案解析】
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