Probabilistic thinking level of junior high school 2 Rembang students who have not formally learnt probability material

Abstract

Abstract This study aimed to describe the level of probabilistic thinking of students with high mathematics abilities and have not formally learned about probability material in Junior High School of 2 Rembang. The research subjects were 2 seventh graders with high mathematics abilities. This research was qualitative research that employed the case study. The main instrument of the research was the researcher and the supporting instruments were the task in the form of probabilistic problems and interview guidelines. The data had been validated using the triangulation of the method. The results showed that the level of probabilistic thinking of junior high school students with high mathematics abilities who have not formally learned the probability material are as follows: (a) In the construct of sample space, the students were at the level of informal quantitative level (level 3) with the characteristics of being able to list the results of stage two experiment using part of the generative strategy. (b) In the construct of experimental probabilities of an event, the students were at the numerical level (level 4) with the characteristics of being able to collect appropriate data to determine the numerical value of the experimental probabilities. (c) In the construct of probabilities comparison, students were at the numerical level (level 4) with the characteristics of being able to determine the size numerically and compare the probabilities.