2. Quantitative statistics: under the guidance of Marxist economic theory, based on qualitative analysis, using mathematical methods and calculation techniques, we study the relationship between economic quantities and their changing laws.
3、? Theoretical statistics: it is a branch of statistics, generalizing and abstracting the research objects, and deducing and demonstrating the statistical methods from a purely theoretical point of view based on probability theory. The central content is statistical inference, and the essence is inductive method.