Anke Lindmeier|Sebastian Kuntze|Kristina Reiss
Representations of data and manipulations through reduction – competencies of German secondary students
statistical literacy encompasses competencies regarding use mathematical representations manipulation data reduction dealing data referring authentic situations basic activities modeling linked domain statistical literacy based recently introduced german standards emphasizing importance representations modeling study aims assessing competencies middle graders german classrooms therefore pilot study 180 fifth eightgraders upper secondary schools conducted additional aim testing properties set assessment tasks results support one hand typical misconceptions students specify hand status quo domain statistical literacy question using raschanalysis support hierarchical concept