We must know the mathematical formulas. If we don't know them, it will be difficult for us to give hints, so you should memorize those basic concepts and formulas. Learning mathematics mainly depends on the accumulation of problem-solving methods. Different types of problems have different methods to solve them. As long as you sum up the problem-solving methods, I believe your math scores will be greatly improved.
Applied Statistics is a book published by People's Posts and Telecommunications Press in May, 20 1 1. The authors are Pan Hong, Zhang Xiaoyu and Wu Yongmin. This book systematically describes the basic knowledge and skills of applied statistics, integrates them into the practical application of spreadsheets, and introduces applied statistical methods such as parameter estimation and hypothesis testing.