Analysis of statistical variability activities in secondary education textbooks: a study from an international proposal standpoint. Uniciencia, [S. l.], v. 35, n. 1, p. 108–123, 2021. DOI: 10.15359/ru.35-1.7. Disponível em: https://www.revistas.una.ac.cr/index.php/uniciencia/article/view/14395.. Acesso em: 28 apr. 2024.