Probabilistic Thinking Level of Junior High School Students with Low Mathematical Abilities Who Have Not Learn Probability Material

Abstract

This research aims to describe the level of probabilistic thinking of Junior High School of 2 Rembang students with low mathematical abilities and have not formally learn probability material in the sample space construct, experimental probability from an event, and probability comparison. The subjects of this research were 2 low mathematical students of class VII.7. This is a qualitative research using case studies. The main instrument in this research was the researcher, and the supporting instruments in this research were tasks in the form of probabilistic problems and interview guidelines. The data obtained by the researcher were validated using time and source triangulation. The results show that the level of probabilistic thinking of junior high school students with low mathematical abilities who had not formally learn probability material is as follows: (a) In the sample space construct, students are at level 2 (transitional level) with the characteristics of being able to register a complete set of results of a one-stage experiment and sometimes a two-stage experiment. (b) In the construct of experimental probability for an event, students are at the subjective level (level 1) with the characteristics of using subjective opinions to determine the most likely or least likely events. (c) In the probability comparison construct, students are at the subjective level (level 1) with the characteristics using subjective opinion to compare the probability of an event in two different sample spaces.