This course is concerned primarily with data analysis in the field of public health, looking at how data can be harnessed to protect and improve the health of individual communities and entire populations. The populations considered can be as small as a local neighbourhood or as large as an entire country. The course covers data analysis and experimental design using the R Project free software environment, examining how it can be applied to public health. In this edition of the course Basic knowledge of software product R is not required, also an elementary level (1st degree in science, medicine or similar) level knowledge of statistics is required.