Jørgen Melau is a researcher and educator with a passion for making complex topics accessible. His professional background lies in physiology and medical science, where he has worked extensively with cold-weather operations and human performance. Alongside this work, he has developed a “secret passion” for statistics and Python programming, blending data analysis with real-world applications. Jørgen writes with students in mind, aiming to remove barriers to learning by combining clear explanations, real datasets, and runnable examples in Google Colab. This mini book on t-test statistics is the first in a series of concise, practice-oriented guides, with forthcoming titles on ANOVA, regression, and data visualization. When he is not writing or teaching, Jørgen is deeply engaged in both research and applied training, bringing the same clarity and enthusiasm to every project he takes on.