Resumen de Interval estimation: methodological approaches and understanding difficulties

María del Carmen Batanero Bernabeu , María Carmen Díaz Batanero , María del Mar López Martín , Antonio Francisco Roldán López de Hierro

• Despite the wide use of interval estimation to complement or replace hypothesis tests, didactic research has described widespread errors in its understanding or application. Although the interval estimation can be carried out from several methodological approaches, the current teaching focuses almost exclusively on the frequentist methodology. This paper begins by describing the main approaches of the interval estimation and summarizes the most common mistakes in their interpretation. The aim is helping statistics teachers to diagnose the difficulties of their students in this subject. Finally, we include some considerations on teaching and some informal approaches.