18th century, due to the maturity of probability theory, it laid the foundation for the development of statistics. /kloc-in the middle of the 0/9th century, probability theory was introduced into statistics, forming a school of mathematics. Its founder is Belgian Lambert Adolphe Jacques Quetelet, known as "the father of modern statistics". His main works include: On Man, Probability Letters, Social System and Social Physics.

Advocate:

Lambert Adolphe Jacques Quetelet advocated studying social phenomena by studying natural science, and formally introduced classical probability theory into statistics, which made statistics enter a new development stage. Due to historical limitations, kettler confused natural phenomena and essential differences in his research, and made some mechanical and vulgar explanations on social problems such as crime and morality with the viewpoint and method of studying natural phenomena.

However, he introduced probability theory into statistics, which made statistics take a step forward on the accurate road on the basis of the "arithmetic" method established by "political arithmetic" and laid the foundation for the formation and development of mathematical statistics.