Julius Kruopis: Pioneer of the applications of mathematical statistics in Lithuania

The paper reviews the scientific and pedagogical activities of Julius Kruopis, the pioneer of Lithuanian applied statistics. His contribution to statistics and cooperation with Lithuanian companies in the application of statistical methods in various fields of human activity is described in the most detail, especially in the quality control area and industrial process optimization. His works in probability theory are also mentioned, emphasizing important contributions to approximations of distributions. Peculiarities of his pedagogical activity, textbooks and monographs, and supervision of students’ theses and dissertations are discussed.