The purpose of this study is to describe the characteristics of statistical reasoning in mathematical problem-solving. The characteristics of statistical reasoning are relational, synthesis, understanding, explain, inference, and interpretation. Respondents in this study were 2 MIPA high school students in Malang. The instrument of this research was a written test question about mathematical problem solving and semi-structural interviews conducted to reveal in-depth regarding the students' statistical reasoning in mathematical problem-solving. The results showed that the students' statistical reasoning characteristics were as follows: 1) relational: students could connect several concepts such as the concepts of space-building volume, comparison of numbers, and system concepts of one-variable equations in mathematical problem solving 2) synthesis: students were able to combine various ideas in mathematical problem solving, 3) understanding: students understood the information contained in the problem, understood the steps to solve the problem, 4) explain: students were able to explain the process of presenting data, the process of analyzing data until the decision making process of which shipping service to choose, 5) inference: students were able to choose the "DEF Express" shipping service to send their book order, and 6) interpretation: students were able to make decision regarding the service costs in which the cheapest shipping service was chosen.
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