题目内容

采用新方法测量铁含量时得到8个数据,采用t检验法计算得到的t值是1.67,而选定显著性水平为0.05时查表得到的t值是2.31,采用新方法是否引起了系统误差()

A. 没有
B. 是
C. 不能判断
D. 可能

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