The traditional measurement theory interprets the variance as the dispersion of a measured value, which is actually contrary to a general mathematical concept that the variance of a constant is 0. This paper will fully demonstrate that the variance in measurement theory is actually the evaluation of probability interval of an error instead of the dispersion of a measured value, point out the key point of mistake in the traditional interpretation, and fully interpret a series of changes in conceptual logic and processing method brought about by this new concept.

中文翻译：

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测量误差的新理论解释及其不确定性

传统的测量理论将方差解释为测量值的离散，这实际上与一个常数的方差为0的一般数学概念相反。本文将充分证明，测量理论中的方差实际上是概率的评估。误差的间隔而不是测量值的分散，指出传统解释中的错误要点，并充分解释这种新概念带来的一系列概念逻辑和处理方法上的变化。