The book provides a step-by-step introduction to the fascinating world of statistical analysis. It requires no prior knowledge of statistics or a specific field, just some basic math skills and curiosity about data, which mainly consists of observed characteristics of individuals. The book includes many examples of questions that can be answered using data, along with simple numerical examples for various types of analyses. It is therefore suitable for first-year students and anyone starting to engage in studies that require data analysis. The reader will find answers to questions such as: What is typical and how variable are observed characteristics? How can one see if and how the observed characteristics are related? What are statistical models? Why are they needed? How do you interpret observed results? What are probabilities and w.