题目内容
(请给出正确答案)
[主观题]
For a given characteristic in a construction process, the standard deviation associated wi
th production variation is 0.8", and the standard deviation associated with measurement variation is 0.6". The total standard deviation for this characteristic is:
A . 1.4"
B . 1.2".
C . 1.0"
D . 0.8"
E . 0.2"
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