The textbook "Vyborochnyj metod v Excel" provides a comprehensive introduction to the fundamental techniques of the selection method within the context of general statistical theory. It is aimed at students who wish to familiarize themselves with the methods of selective observation. The book explains how targeted selection of subsets of data can lead to conclusions about the whole, significantly enhancing the efficiency of research projects. This method is particularly applicable in the field of agriculture, for instance, in assessing the quality of agricultural products or the productivity of animals. The textbook is specifically designed for students in the field of animal science and offers practical examples as well as theoretical foundations that are essential for understanding statistical analysis.