Algorithms for processing statistical materials are considered: grouping of source materials, calculation of statistical indicators of the distribution of the trait, calculation of the normal distribution curve, criteria for the reliability of the difference, indicators of the communication measure. An example of calculation of the simplest regression equations and their estimation. is considered. The annex contains the necessary source and reference materials. Intended for students of the Forestry Institute of the areas of training 250100. 62 “Forestry” and 250700. 62 “Landscape architecture” of full-time and part-time education .