Computing probabilities from two way tables: An exploratory study with future teachers.

Being able of correctly read and interpret two ways tables is a basic component of statistical literacy for every citizen. Therefore, future teachers who will be responsible to teach statistics to children at school level should acquire these abilities along their training. However, this capacity is taken for granted in Spain and its teaching is not usually included in the curriculum for training teachers. In this study present the results of a small exploratory study that describe the future teachers' semiotic conflicts in solving elementary probability problems when data re given in a two-way table.