Mathematics is tested from chapter one to chapter eight, but obviously it is also very important.

The first and second chapters are the basis, and generally only multiple-choice questions are taken, but big questions are not excluded. The first chapter is mainly about addition formula, multiplication formula, total probability formula, Bayesian formula and so on. The second chapter is about those common distributions. Remember them well, and you don't need to pay attention to the two-dimensional normality.

The third chapter is very important. There are two main modules, one is discrete and the other is continuous. But they are all divided into probability function and distribution function. Marginal distribution and conditional distribution are the focus of the exam.

The fourth chapter is mainly about calculation, remembering the expectation and variance of those common distributions. There are also some formulas, such as finding expectation, variance, covariance and correlation coefficient, to understand the relationship between independence and irrelevance.

Chapter V There are no exams, and there are few exams. Just remember the conditions satisfied by different theorems of large numbers. Convergence in probability said in the exam, just fill in the expected value.

Chapter 6783 belongs to mathematical statistics.

The sixth chapter mainly remembers three typical patterns of distribution, which are almost the same. The expectation and variance of the x2 distribution can also be used indirectly.

In chapter 7, there is a big problem and two key points almost every year in recent years, one is moment estimation and the other is maximum likelihood estimation. Sometimes, we also test fairness and so on.

Chapter 8 has only been tested once in more than 20 years. It's up to you.

In addition, I recommend the review books compiled by Li Yongle and Li Zhengyuan. I have read them several times and benefited a lot. Basic Pass 660 also greatly improves the ability of multiple-choice questions and fill-in-the-blank questions. Of course, I'm not advertising.