第1个回答 2011-10-20
20 century ago mathematical statistics the development of an important achievement, is in the late nineteenth century by the British geneticists and statisticians gore's launch, and one of the founders of the modern statistics k. Pearson and some other British scholar in the development of statistical correlation and regression theory. The so-called statistical correlation, it is to point to a kind of the decisive relations such as height and weight Y X, the existence of a roughly, the relation between the performance in the X (small), Y also tend to high (low), but the decisive: by the X and Y can't decide. The real life and all kinds of science and technology field, this example many, such as education and income by the relationship between the fixed number of year, economic development level and the relationship between the velocity of population growth, it is to belong to the nature, statistics related theory, the relationship between the degree of quantization, and statistics regression is put a statistical related variables, such as the above height and weight of the X Y of the relationship between the approximate form of the estimate, called the regression equation, the phenomenon of the real world often in many variables, are they of the complicated relationship, and many belong to the nature of the decision, the invention of the correlated regression theory, and provides a through the actual observation to the relationship between the quantitative tools, has a major knowledge and practical significance.