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All Journal Range : Jurnal Pendidikan Matematika Indonesian Educational Research Journal
Eduardus Beo Seso Delvion
Universitas Timor
Education Mathematics

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Survival Model Estimator for Type II Censored Data Based on Lognormal Distribution Eduardus Beo Seso Delvion; Cecilia Novianti Salsinha; Minanur Rohman
RANGE: Jurnal Pendidikan Matematika Vol. 5 No. 2 (2024): Range Januari 2024
Publisher : Pendidikan Matematika UNIMOR

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32938/jpm.Vol5.Iss2.5573

Abstract

The problems that occur in analyzing survival models based on parametric distributions require parameter values ​​obtained from estimators. This study aims to obtain an estimator model of the lognormal distribution which has parameters and . Therefore, the maximum likelihood method approach is used to obtain the estimators and . However, the problem encountered is that the maximum likelihood model of the lognormal distribution for Type II cencoring data produces quite complex equations, so an approach with a Taylor series is needed only for the first order. The results obtained are estimators and which can be applied to Type II cencoring data based on a lognormal distribution.
The Differences in Effectiveness of Learning Using Contextual Teaching and Learning (CTL) and The Missouri Mathematics Project (MMP) in Terms of Mathematics Learning Outcomes Yosepha P. W. Laja; Eduardus Beo Seso Delvion; Meiva Marthaulina Lestari Siahaan; Ermelinda Nainahas; Minanur Rohman
RANGE: Jurnal Pendidikan Matematika Vol. 6 No. 1 (2024): Range Juli 2024
Publisher : Pendidikan Matematika UNIMOR

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32938/jpm.v6i1.6844

Abstract

This study aims to compare the effectiveness of learning using Contextual Teaching and Learning (CTL) and the Missouri Mathematics Project (MMP) in terms of students' mathematics learning outcomes. The research method employed was an experiment with a pretest-posttest non-equivalent comparison-group design. The research population consisted of seventh-grade students, with the sample being students from class VII A using the CTL learning model and class VII B using the MMP learning model. The independent variable in this study is the learning model, while the dependent variable is the mathematics learning outcomes. The instruments used were a learning outcome test and an observation sheet for the implementation of learning. The results of the study indicate that both learning models, CTL and MMP, are effective in improving students' mathematics learning outcomes. The Wilcoxon test analysis showed that the significance values for both models were less than 0.05, indicating their effectiveness. However, the Mann-Whitney test revealed no significant difference in effectiveness between the two learning models. These findings suggest that both CTL and MMP can be used as effective alternative teaching methods to enhance students' mathematics learning outcomes. This study contributes to the selection of appropriate teaching methods to improve understanding and learning outcomes in mathematics. It is recommended for future researchers to investigate other aspects such as cognitive, psychomotor, or affective domains, and for teachers to consider using CTL and MMP in their teaching activities.
Profile of Social Arithmetic Problem Solving Ability of Grade VII Junior High School Students Regina Afeanpah; Aloisius Loka Son; Eduardus B.S. Delvion
Indonesian Educational Research Journal Vol. 1 No. 1 (2023): Education and Learning Strategies in Various Contexts
Publisher : CV. Samuel Manurung and Co

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56773/ierj.v1i1.12

Abstract

The aim of this study is to describe the profile of social arithmetic problem-solving abilities of Grade VII students in one of the junior high schools in the TTU Regency. The type of research used in this study is a qualitative description, and the subjects of the study were 17 students, of whom six were selected for interviews. The six students included two high-ability, two moderate-ability, and two low-ability students. The data analysis model used in this study is the interactive data analysis model developed by Miles and Huberman. The results of the study show that: 1) Students in the high-ability category were able to fulfill all indicators of problem-solving, including understanding the problem, devising a plan, carrying out the plan, and looking back; 2) Students in the moderate-ability category were able to meet the indicators of understand the problem, devising a plan, and carry out the plan, but were unable to meet the indicator of look back; 3) Students with low abilities were able to fulfill the steps of understanding the problem and devising a plan, but were unable to fulfill the steps of carrying out the plan and look back.
High School Students' Mathematical Connection Ability Profile in Solving Three-Variable Linear Equation System Problems Based on Cognitive Style Maria Densiana Nailake; Aloisius Loka Son; Eduardus Beo Seso Delvion
Indonesian Educational Research Journal Vol. 1 No. 2 (2023): Improving Learning Quality and Student Abilities
Publisher : CV. Samuel Manurung and Co

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56773/ierj.v1i2.16

Abstract

This study aims to describe the profile of high school students' mathematical connection abilities in solving problems on systems of three-variable linear equations based on cognitive style. The method used in this research is qualitative. This research was carried out in the even semester of the 2022/2023 academic year. The research subjects were 27 class X students at a high school in the North Central Timor district. Subjects were grouped based on FI and FD cognitive styles. Next, 6 subjects were selected, namely 3 FI and 3 FD to take the mathematical connection ability test. The instruments used in this research were GEFT, mathematical connection ability tests, and interviews. Data analysis techniques are data reduction, data presentation, and conclusion. The results of this study show that the mathematical connection abilities of each student are different. Subjects with a field-independent cognitive style meet all indicators of mathematical connection ability, while subjects with a field-dependent cognitive style do not meet all indicators of mathematical connection ability
Mathematical Communication Skills in Middle School: A Study of Eighth-Grade Students in West Timor, Indonesia Anna Sako Bimolo; Aloisius Loka Son; Eduardus Beo Seso Delvion; Javier García-García
Indonesian Educational Research Journal Vol. 3 No. 2 (2025): Educational interventions and management to facilitate various student skills
Publisher : CV. Samuel Manurung and Co

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56773/ierj.v3i2.102

Abstract

This study aims to analyze the mathematical communication skills of grade VIII students of the First Secondary School on the material of Relations and Functions. The method used was qualitative descriptive research with the subjects of 21 students in class VIII-B for the 2024/2025 school year. Data was collected through a description test that included indicators of mathematical communication skills and interviews to deepen the results of the analysis. The results of the study show that students' written mathematical communication skills still vary with a tendency to be in the medium to low category. The indicator expressing mathematical ideas in written and visual form obtained the highest achievement of 76.38%, while the indicator interpreted and evaluated ideas only reached 52.86% and the use of mathematical notation reached 47.62%. High-skill students are able to write mathematical models correctly even though the use of formal terms is not consistent, moderate-skill students tend to provide limited explanations, while low-skill students copy more problems without constructing a proper mathematical model. These findings indicate the need for a learning strategy that emphasizes written mathematical communication exercises in a more orderly manner, both in the form of sentences, tables, graphs, and symbols to improve the quality of students' understanding of concepts
Co-Authors Aloisius Loka Son Anna Sako Bimolo Cecilia Novianti Salsinha Ermelinda Nainahas Javier García-García Maria Densiana Nailake Minanur Rohman Regina Afeanpah Siahaan, Meiva Marthaulina Lestari Yosepha P. W. Laja