Kuntze, Sebastian, Laura Martignon, Francisco Vargas, and Joachim Engel. “Competencies in Understanding Statistical Information in Primary and Secondary School Levels: An Inter-Cultural Empirical Study With German and Colombian Students”. Advances of Research in Mathematics Education, no. 7 (May 5, 2015): 5–25. Accessed July 21, 2026. https://aiem.es/aiem/article/view/3936.