I want to make sure that my understanding of the difference between estimator and expectation is right.
问题描述：
I want to make sure that my understanding of the difference between estimator and expectation is right.
Expectation is the true mean as we draw a great number of random sample to figure it out.
While,the estimator is a mean as well,but it is not a true mean as the not sufficient number of random sample I have framed.
这英文是我自己的，我懒得换成中文。
答
在句话应该是一位老师的口头表达,大致意思就是期望是基于大量数据得出的结论,被认为是正确结果.而估计由于没有足够多样本,不能算作为最终正确的结果.我的问题不是英语问题什么问题？我是说，我感觉你是不是在翻译我用英文写的东西，那个是我自己的理解。我的问题就是estimator和expectation的区别。根据我之前学习的经验（我们之前学习C++编程教材也都是英文版的，耽误了不少时间。），我是建议你买一本中文的书，首先把要学的东西搞懂了，再通过英文版的学一些它们的特别简洁。否则得不偿失。