取某种橡胶件的7个样品,测量其抗拉强度,得到数据如下: 45.5,45.9,46.9,45.8,44.7,45.5。45.3去除

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取某种橡胶件的7个样品,测量其抗拉强度,得到数据如下: 45.5,45.9,46.9,45.8,44.7,45.5。45.3去除了一个最大值和一个最小值后,所计算出的均值为( )。

A.45.5

B.45.6

C.45.7

D.45.8

参考答案:

B去除了一个最大值46.9和一个最小值44.7后,抗拉强度的均值等于(45.5+45.9+45.8+45.5+45.3)÷5=45.6。

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