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什么是偶然误差,它有哪些基本特性?

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正确答案:

偶然误差是在相同的观测条件下,对某量进行了n次观测,如果误差出现的大小和符号均不一定,则这种误差称为偶然误差。

主要包括:(1)有界性;(2)对称性;(3)抵偿性;(4)密集性。答对2项即可得全部分

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