期望与均值有什么区别？

thanks
7# franksj

很有意思的讨论，这种讨论支持

看懂了

期望是加权平均值，可以当重心理解，均值就是算术平均。

If you do an experiment,

The expected value is given by the average of all the possible values weighted by their probability.
The mean instead is the actual mean value you have after N runs.

Statistically: Mean-->Expected Value for N-->infinite.

Of course if you calculate the expected value and the mean on a finite set of value the two calculation will give the same result.

两个是一样的概念，只是叫法不一样而已

感谢！

观点不错  学习了

也是纠结了很久才找到最终的解决方案，谢谢

学习了