This research analyses Spanish secondary school students' reading capacity of elements in a frequency table. The study is based on the two reading levels of reading the data and reading between the data proposed by Curcio (1989) and applied to data displayed in a statistical table. The results of the evaluation study carried out with 149 students in secondary school first grade and 128 in third grade (12–14-year-olds) show that the majority of the sample performs a correct reading, especially in the first reading level. We also use the notion of semiotic conflict proposed by Godino et al. (2007, 2019) to describe mistakes in the students' responses, which were mainly comparing frequencies incorrectly and misunderstanding the questions posed.
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