Método Delphi: validar un instrumento para la medición de características de un libro de texto de probabilidad y estadística

The design and validity obtained from a data collection instrument are necessary to guarantee the reliability of the information within an investigation. This work describes several tools for measuring textbook contents, their particularities, and benefits indicated by different authors, the permanence of the book as a teaching resource within the classroom, in the life of the teacher and the student. As well as explaining how the subject of Probability and Statistics is taught in engineering careers at a higher level of education. The application of the Delphi Method allows developing a tool to measure the content of Probability and Statistics textbooks, employing ten proposed items. The usefulness of the methodology is demonstrated by ensuring the reliability of the tool, obtaining quantitative and qualitative information. The method is developed in stages for better understanding, and expert judgement is used, despite sometimes being ignored. Finally, an alternative validation in instrument design is proposed analytically and reliably.