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Implementation of Geometric Brownian Motion to Predict Crude Oil Prices Feby Seru; Christian Dwi Suhendra; Agung Dwi Saputro; Gautam Makwana; H Elizabeth
Numerical: Jurnal Matematika dan Pendidikan Matematika Vol. 6 No. 2 (2022)
Publisher : Institut Agama Islam Ma'arif NU (IAIMNU) Metro Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25217/numerical.v6i2.2674

Crude oil has a vital role in the economic growth of a country because crude oil is a source of energy driving the economy. To maintain economic stability, the price of crude oil in the coming period needs to be anticipated by making predictions on world crude oil commodity prices. One of the models that can be used to predict crude oil prices in the short term is Geometric Brownian Motion (GBM). This study aims to implement the GBM model to predict crude oil prices during the Covid-19 pandemic and measure the model's accuracy. This study made crude oil price predictions with several iterations of 50, 100, and 1000. The results showed that the smallest MAPE value was carried out 1000 times in iterations, namely 2.13%. Based on the MAPE value, it can be concluded that the results of crude oil price predictions using GBM have a high level of accuracy.

Comparison of Fuzzy Time Series Markov Chain and Fuzzy Time Series Lee in North Sumatra Import Value Forecasting Syukur Iman J. Telaumbanua; Didi Febrian
Numerical: Jurnal Matematika dan Pendidikan Matematika Vol. 7 No. 1 (2023)
Publisher : Institut Agama Islam Ma'arif NU (IAIMNU) Metro Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25217/numerical.v7i1.2745

North Sumatra is a province that carries out import activities in other provinces to complement the shortage of goods in North Sumatra. Every month based on data from the Central Bureau of Statistics (BPS) of North Sumatra, the import value of North Sumatra constantly fluctuates. So a method is needed to show the increase or decrease in the value of North Sumatra in the next period. The method is forecasting, where forecasting is an activity that predicts something in the future, intending to get information in the next period as a decision or decision in the future. Many forecasting methods can be used, but this study uses fuzzy time series Markov Chain and fuzzy time series Lee methods. These two methods aim to obtain the best forecasting method based on the minor mean absolute percentage error (MAPE) and mean square error (MSE). In this study, the data is on the value of imports in North Sumatra taken from the Central Statistics Agency (BPS) of North Sumatra. The test results on forecasting the import value of North Sumatra show that the fuzzy time series Markov Chain is better than the Fuzzy Time series Lee based on the smallest MAPE and MSE values. The MAPE fuzzy time series Markov Chain value is 7.7467%, and the MSE value is 176,748,587. Meanwhile, Lee's fuzzy time series has a MAPE of 10.014% and an MSE value of 2,387,874,804.

Implementation of The Analytical Hierarchy Process (AHP) Method for The Selection of Achieving Students at Universitas Nahdlatul Ulama Sunan Giri M. Ivan Ariful Fathoni; Dwi Nurul Hidayati; Anisa Fitri
Numerical: Jurnal Matematika dan Pendidikan Matematika Vol. 6 No. 2 (2022)
Publisher : Institut Agama Islam Ma'arif NU (IAIMNU) Metro Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25217/numerical.v6i2.2766

Universitas Nahdlatul Ulama Sunan Giri (UNUGIRI) has many students who have achievements. The number of outstanding students is a problem in determining the decision-making of outstanding students. One of the effective decision-making methods for solving problems in selecting outstanding students is the Analytical Hierarchy Process (AHP) method. The AHP method in this study considers four criteria: Grade Point Average, Writing Paper, Achievement (Non-Academic), and SPEKMA points. Out of 73 UNUGIRI students who had achievements, a ranking was carried out into ten alternative students. The results of calculating ten alternatives based on four criteria with the AHP method obtained the highest score of 0.1437 for students with the name PWA. Based on these results, PWA can be designated as outstanding students for the 2021/2022 academic year.

Development of Flat Solid Figure Learning Design based Rejang Lebong Ethnomathematics Agung Setia Budi; Armiati; Edwin Musdi; Ali Asmar
Numerical: Jurnal Matematika dan Pendidikan Matematika Vol. 7 No. 1 (2023)
Publisher : Institut Agama Islam Ma'arif NU (IAIMNU) Metro Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25217/numerical.v7i1.2790

This study aims to produce a learning design for flat-sided geometry based on Rejang Lebong ethnomathematics to improve students' mathematical problem-solving skills that are valid, practical, and effective. It is motivated by the low ability to solve students’ mathematical problems. Mathematics learning carried out in schools should involve students actively. The research procedure is guided by the Plomp development design. The development model studied by Plomp is the initial investigation, development, prototyping, and research phases. In the initial investigation phase, the implementation of needs, curriculum, concept, and student analyses was implemented. In the prototype development phase, formative evaluation consists of self-evaluation, one-on-one evaluation, one-on-one evaluation, small group evaluation, and testing. Meanwhile, at the time of its application, it was tested on students of class VIII SMP to see the learning outcomes of the learning problem-solving abilities. Based on the development that has been carried out, it is obtained that the learning design of flat-sided geometry based on the Rejang Lebong ethnomathematics in the form of HLT, teacher's books, and books for class VIII SMP students are valid, practical, and effective.

Analysis Numerical Literacy Ability in Middle School Students in Material Set Ulfa Luthfiani; Sehatta Saragih; Elfis Suanto; Maimunah
Numerical: Jurnal Matematika dan Pendidikan Matematika Vol. 7 No. 1 (2023)
Publisher : Institut Agama Islam Ma'arif NU (IAIMNU) Metro Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25217/numerical.v7i1.2896

This study identified the numeracy literacy skills of Almuttaqin MTS students in a rigid material. A hallmark of numeracy literacy is the capacity to apply numbers and related symbols to operations on algebraic forms, analyze data, and understand analysis findings to predict and make judgments. Tests and interviews were used to collect data, which were then analyzed through data reduction, presentation, and conclusion. Based on the findings, the numeracy literacy skills of MTS Almuttaqin students, one student (4%) is included in the excellent group for numeracy literacy, nine students (34%) are included in the excellent category, 15 students (50%) are included in the good category, and five students (11)% is included in the less category. Students with high numeracy literacy (ST) can use various numbers and symbols to solve problems, analyze information to make predictions, evaluate the findings of their analysis, and make decisions when handling the challenges of the given material. Using various numbers and symbols to solve problems and analyze information is the only marker that satisfies students with moderate numeracy literacy (SD). They have not yet reached the stage where they can make the best choices regarding their assigned content. Students with limited numeracy literacy (SR) only write numbers and are identified when completing assignments. As a result, SD and SR have not fully learned numeracy skills. The indications that were not fulfilled were caused by mistakes made by students, including not carefully recording known and asked data, choosing an inappropriate problem-solving approach, and not understanding ideas well enough to answer questions problem.

Implementation Probing Prompting Learning Model on Students' Mathematical Concepts Understanding Ability and Self Confidence Dewi Risalah; Novia Yulianti; Iwit Prihatin
Numerical: Jurnal Matematika dan Pendidikan Matematika Vol. 7 No. 1 (2023)
Publisher : Institut Agama Islam Ma'arif NU (IAIMNU) Metro Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25217/numerical.v7i1.3066

The model of Probing prompts is learning with the way the teacher presents nature questions, lead, and dig so that student requires the ability to understand and develop draft mathematics in finished question. The purpose of this study is to find out how the application of the probing prompting learning model to the ability to understand mathematical concepts in terms of students' self-confidence in the material Algebraic Forms class VII SMP Negeri 1 Sungai Raya. The method used in this study is an experimental method, with the experimental form used being the Quasy Experimental Design experiment, and the research design is a 2 x 3 factorial design. The population of this study was all grade VII students at SMP Negeri 1 Sungai Raya consisting of 5 classes, with samples of class VIIG and VIIH taken using the Cluster Random Sampling technique. Based on the analysis of the variance of two paths with unequal cells, it was concluded that there is a significant difference in the ability to understand mathematical concepts between probing prompting and conventional learning models regarding self-confidence in the material of algebraic forms.

Improving Students’ Self-Confidence and Problem-Solving Ability Through RME Approach with TTW Type Cooperative Learning Model Setting Sri Adiningsih Utami Ningrum; Sri Rejeki
Numerical: Jurnal Matematika dan Pendidikan Matematika Vol. 7 No. 1 (2023)
Publisher : Institut Agama Islam Ma'arif NU (IAIMNU) Metro Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25217/numerical.v7i1.3093

Students studying mathematics get training in developing their problem-solving skills. Cognitive capacity and self-confidence can have an impact on problem-solving skills. This study aims to increase students' confidence and mathematical problem-solving skills through the TTW-type cooperative learning model RME approach. Research this class action with the Kemmis & Taggart model that can cover several cycles. The implementation of this study is two cycles with the research subjects of 28 grade VII students at a junior high school in Surakarta in the 2022/2023 academic year. Data is obtained through observation and tests. Data analysis techniques are carried out with descriptive statistics and supported by qualitative analysis of student work results. Based on the results of data analysis, confidence, and mathematical problem-solving skills, students have improved in each cycle. Students' confidence average score increased from 35.7 in the pre-cycle to 67.8 in the first and 84.8 in the second cycles. Students' mathematical problem-solving skills increased from an average score of 60 pre-cycle to 72.7 in the first cycle and 78.3 in the second cycle. This study increased self-confidence and mathematical problem-solving skills for grade VII junior high school students by applying the RME approach to setting the TTW-type cooperative learning model seen from an increase in average scores that are quite significant with 49.1 and 18.3, respectively. This finding shows the need for further efforts to achieve improved mathematical problem-solving skills that are more optimal.

Development of a Quizizz-Based Mathematics Learning Assessment Tools to Improve Students' Concepts Understanding Septi Wulandari; Haninda Bharata; Undang Rosidin
Numerical: Jurnal Matematika dan Pendidikan Matematika Vol. 7 No. 1 (2023)
Publisher : Institut Agama Islam Ma'arif NU (IAIMNU) Metro Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25217/numerical.v7i1.3103

This study aims to develop a Quizziz-based assessment tool and test its effectiveness on students' conceptual understanding abilities. This research began with preliminary studies, preparation of Quizziz-based Assessment Tools, validation of Quizziz-based Assessment Tools, limited field trials, and field trials. The subjects of this study were class VIII students of SMPN 6 Kota Metro in the 2022/2023 academic year. Research data was obtained through tests of critical thinking skills. The preliminary study results show the need to develop a Quizziz-based Assessment Tool. The Quizziz-based Assessment Toolkit is prepared by compiling a draft of the Quizziz-based Assessment Toolkit and all of its components. The results of the validation show that the Quizziz-based Assessment Tool meets the eligibility standards for content, media, and language in the proper category. The results of the field tests showed that there were differences in the conceptual understanding abilities of students in the experimental class and the control class. The conceptual understanding abilities of students who used Quizziz-based Assessment Tools were higher than the students' conceptual understanding abilities who did not use Quizziz-based Assessment Tools. Based on the field test results, it can be concluded that the Quizziz-based Assessment Tool effectively increases students' conceptual understanding skills.

Students' Ability to Solve Arithmetic Problems Based on APOS Theory in Cognitive Styles Differences Eka Siti Maullina; Nining Setyaningsih
Numerical: Jurnal Matematika dan Pendidikan Matematika Vol. 7 No. 1 (2023)
Publisher : Institut Agama Islam Ma'arif NU (IAIMNU) Metro Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25217/numerical.v7i1.3134

This study describes the ability to solve systematic problems regarding field-dependent (FD) and field-independent (FI) cognitive styles in arithmetic material. Solving systematic problems based on the APOS theory (action, process, object, schema) describes the ability of each student's cognitive style. This type of research is descriptive, using a qualitative approach. The research subjects consisted of four students consisting of two students with an FD and two FI styles in class X SMA Negeri 1 Gemolong. Data collection methods are tests and interviews. The instruments in the research were the researchers themselves, the GEFT (Group Embedded Figure Test) test as an instrument in selecting research subjects, a test of the ability to solve arithmetic problems based on APOS and interview guidelines. The analysis technique used in this study is data reduction, data presentation, and conclusion. The results showed that students with a FI cognitive style were better at problem-solving than students with an FD cognitive style. Subject FI can solve mathematical problems systematically based on APOS theory, and FI can determine methods for solving mathematical problems and originate from their thoughts not influenced by other parties. Meanwhile, FD has difficulty solving problems systematically and understanding and making mathematical models, which tends to be problematic in understanding mathematical problems and solutions that do not originate from their thinking.

Analysis of Students' Thinking Ability in Discovery Learning-Based Worksheets to Improve Mathematical Problem-Solving Ability Eva Fitriani Sari; Sugeng Sutiarso; Sri Hastuti Noer
Numerical: Jurnal Matematika dan Pendidikan Matematika Vol. 7 No. 1 (2023)
Publisher : Institut Agama Islam Ma'arif NU (IAIMNU) Metro Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25217/numerical.v7i1.3147

Problem-solving ability is essential in the process of learning mathematics. Looking at students' mathematical problem-solving abilities, which can be seen from the learning outcomes, are still less than the expected average. One of the efforts that can be made to improve students' problem-solving skills is to develop Discovery Learning-based worksheets. This study analysed students' thinking skills to improve their mathematical problem-solving abilities. This study uses a qualitative approach with a case study method that emphasizes real cases. This research was conducted on SMP Negeri 6 Metro class VII students on Quadrilaterals. The research used a purposive sampling technique to study as many as 26 students as subjects. The data analysis process was carried out by describing the results of the analysis of answers in writing and showed the ability to write systematic problem-solving procedures. The study results in show that the developed LKPD is very valid; it can be seen that: (1) the achieving results the high category in the application of the Discovery Learning model, (2) the score of each aspect of problem-solving in mathematics has increased, (3) the final test average score has increased, and (4) the score of each problem-solving indicator in mathematics has increased. This can be seen based on the test, and the results show a significant difference between the average increase in learning outcomes in the experimental class using discovery learning-based worksheets and the control class that does not use discovery learning-based worksheets. So it can be concluded that the developed LKPD based on discovery learning is valid, practical, and effective for improving students' mathematical problem-solving abilities.

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Contact Name
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Contact Email
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Phone
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Journal Mail Official
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Editorial Address
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Location
Kota metro,

Lampung

INDONESIA