数理統計学的中心任务之一可以用下面这句話來描述:“根据一个或几个子样中的观察值,对母体的統計性貭进行概率性的判断”、概率性的判断也可說是推测性的判断,这种判断的可靠性沒有百分之百。推測性的判断簡称推断。本文的目的就是要簡单介紹工业技术中常用的三 One of the central tasks of mathematical statistics can be described by the following sentence: “According to the observations in one or several subsamples, the probabilistic judgment of the mother’s statistical enthalpy” and probabilistic judgment can also be said Speculative judgments, the reliability of this judgment is not 100%. The speculative judgment is abbreviated inference. The purpose of this article is to briefly introduce three commonly used in industrial technology.