Students’ Mathematics Representation of the Statistics: A Case Study

The purpose of this study is to investigate students' mathematics representations of the statistics. This research is qualitative research with a case study design. The subjects of this study were five 9th graders. The data were collected using the student's worksheets and interviews. The students' mathematics representation was seen through the statistics problems' results; then, we continued with the interview. The findings of this research indicate that the student’s high-ability can represent their answers visually in the form of bar, line, and circle diagrams well. Meanwhile, students with low-ability present their work differently on line diagrams drawn upside down, and unanswered circle charts because they have difficulty calculating and measuring percentages in circles, so they are not able to express their ideas visually optimally. For verbal representations, each student presented his answer briefly, which only wrote down the final result of the answer being asked without providing any information. Then for the ability of symbolic representation, students can represent their answers symbolically in algebraic form and solve the problems given systematically.