In this paper we analyse the responses given by 643 Mexican students from Secondary Education and High School to a problem involving the comparison of ordinal data. Using some ideas from the Onto-semiotic approach proposed by Godino and colleagues, we carry out an analysis of the open responses, taking into account the central tendency measure used in the comparison and the students’ conflicts. We use the Chi-square test to study the possible dependence between responses and school level. We observe better results in secondary school students who use median and mode more frequently, although they also tend to omit the response more frequently.
(Friday 16th, 08:20-09:20)
Carmen Díaz (Spain)