The Students' Probabilistic Thinking Profile Based Cooperative Learning Numbered Heads Together (NHT) Type

Abstract

This study aims to determine the students' probabilistic thinking profile level of grade IX-A SMP Muhammadiyah 3 Mlati in the learning process of Numbered Heads Together (NHT). This type of research was descriptive qualitative research with subjects in this study were drawn from grade IX-A SMP Muhammadiyah 3 Mlati which amounted to 22 students and elected 8 of the research subject.The technique of data collection in this study consisted of probabilistic problem-solving questions test and interview guidelines.The results showed that after being held of Numbered Heads Together (NHT) cooperative learning, it was obtained the conclusion (1) students' probabilistic thinking level 1 (Subjective) in solving the problem of probability were less likely to understand the questions, the strategy used tended to be out of the concept, the subject in the register space of the sample answered was less complete and had been difficulty in predicting an event,(2) students' probabilistic thinking level 2 (Transitional) in solving problems of probability tended to be a little added information, the subject was able to register complete of a set of one level experimental results, and in predicting and recording an event based on the opinions in quantitative terms but returned at subjective opinion, (3) students' probabilistic thinking level 3 (Informal Quantitative) in solving the problem of probability were able to provide information when retold the matter and tended to understand the subject, the used concepts tended to be correct, however there were strategies which were less precise, (4) students' probabilistic thinking level 4 (Numeric) in solving the problem of probability of being able to explain questions and answers, as well as performed calculations using the formula and the right steps, the subject was able to register complete of a set experimental results of two or three levels, and to mention the probability definitely.