One of the first principles of probability is the idea of independence.
概率论第一个基本原理中的一条是事件的独立性。
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Parameter estimation as minimization - intro to method of least squares, introduction to probability theory, conditional and joint probabilities, statistical independence.
以最小化问题估算参数-最小平方法介绍，机率论介绍，条件机率及联合机率，统计无关。
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So it is the important subject in probability to study the independence of stochastic variable.