Jurnal Matematika, Statistika dan Komputasi

RAINBOW CONNECTED NUMBER (POINTS) ON A CANDLE GRAPH

Fitri Sitinjak

Grouping Districts/Cities in Central Java by Social Vulnerability Index to Dengue Hemorrhagic Fever

A. Naufal Muzakky

Indonesia has a tropical climate, making it an ideal place for the spread of Dengue Hemorrhagic Fever (DHF). By 2022, the dengue case fatality rate (CFR) in Indonesia will not meet the target of the National Strategy for Dengue Prevention. The province with the highest DHF CFR is Central Java so efforts are needed to reduce the burden of DHF disease by reducing vulnerability in the community, namely social vulnerability to DHF. This study aims to develop a Social Vulnerability Index to DHF (IKS DBD) using exploratory factor analysis, grouping districts/cities according to IKS DBD using natural breaks, and identifying dimensions that become policy priorities using radar plots. The data used were sourced from the Central Java Provincial Health Office (Dinkes) and the Central Bureau of Statistics (BPS). The results showed that there were four factors contributing to social vulnerability to DHF, namely socioeconomic and urban areas, health services, vulnerable populations, and housing, which explained a total variance of 76,651 percent. The grouping of districts/cities resulted in five categories of vulnerability, that is very high, high, medium, low, and very low vulnerability with 5,10,10,5, and 5 districts/cities, respectively. From the resulting radar plot, each social vulnerability group has different policy priority dimensions so that the research results can be used by the government in making policies that can have a significant impact.

Sta

Naufal zaidan Irfanudin

Probabilitas merupakan salah satu metode statistik yang digunakan untuk

mengukur kemungkinan suatu peristiwa terjadi dari suatu kejadian acak. Di dunia

investasi, ketidakpastian akan selalu hadir. Investor selalu dihadapkan dengan

risiko yang kemungkinan akan terjadi seperti kehilangan uang yang telah

diinvestasikan. Namun, di balik risiko tersebut, terdapat potensi keuntungan yang

akan diperoleh. Probabilitas merupakan konsep penting dalam dunia investasi

untuk menentukan tingkat risiko dan tangkat pengembalian investasi. Artikel ini

menjelaskan tentang keterkaitan antara metode statistik probabilitas dengan

bisnis yakni dalam hal ini adalah pengambilan keputusan investasi perusahaan

dengan melihat peluang yang diperkirakan akan terjadi.

Kata Kunci: Probabilitas, Tingkat Resiko, Tingkat Pengembalian, Keputusan

Investasi

Escalation of Human Resource Quality in National Health Resilience Through Estimating Multilevel Model Parameters with the Restricted Maximum Likelihood Approach to the 2019 UTBK Average

Dhita Hartanti Octavia

Multilevel modeling or Hierarchical Linear Modeling (HLM) is a statistical approach specifically used to analyze data with a two-level structure. This approach allows an understanding of the contribution of factors at both the individual and group levels to the response variable. One method commonly used in HLM is Restricted Maximum Likelihood (REML). REML is a parameter estimation method that is often applied in statistical models, especially linear models that incorporate random components. This allows more efficient parameter assessment compared to conventional estimation methods. In this research, multilevel model parameter estimation analysis was carried out using the limited maximum likelihood approach. The aim is to determine the multilevel linear regression model on the average UTBK score for health cluster study programs in 2019. This involves selecting the optimal node point based on the minimum Generalized Cross Validation (GCV) and identifying the factors that influence it. Predictor variables considered include interest and capacity of study programs at university level (Level-1), as well as the average UNBK and HDI scores at provincial level (Level-2). The findings of this research indicate that the most appropriate multilevel regression model is formed with three nodes with a minimum GCV value at Level-1 of 864.6593 and at Level-2 of 3.1816. At Level-1, the influencing factor is the interest variable and at Level-2 is the average provincial UNBK score in 2019 and the Human Development Index (HDI).

S Survival Analysis of Penile Cancer Patients Using Cox-Proportional Hazard and GPT-4

Wiwik Wiyanti

Today, in 2024, artificial intelligence (AI) evolution is very impressive. An AI product that continues develop is ChatGPT. The threat of ChatGPT to some job profession is real. Beside that, ChatGPT also help in many professions make their work are easier. In this research, study analyzing the survival analysis of penile cancer patients. The design of this research is mixed method (quantitative-qualitative). The quantitative and qualitative methods that used are Cox-proportional Hazard and GPT-4, respectively. Based on quantitative analysis, it can be concluded that the Survival and Hazard model for study penile cancer are and , respectively. The predicted chances of survival and death for the patient Stage 2, 14 days after surgery are 40% and 60%, respectively. Based on qualitative analysis, it can be concluded that GPT-4 can help data analysts to analysis of survival data very well

Keywords: survival, analysis, cancer, gpt4, proportional, hazard

Determinants Of Stunting Under Five In West Nusa Tenggara Province Using Multilevel Binary Logistic Regression

Ananda Rambi, Budyanra

Stunting is a form of malnutrition in toddlers which has an impact on stunted development, decreased cognitive function or immune function, and metabolic disorders in toddlers. Based on SSGI results, the prevalence of stunting among toddlers in NTB Province was 32.7 percent, an increase of 1.3 percent compared to the previous year. This value has not yet reached the threshold of 20 percent and the national target of 18.4 percent. This makes NTB Province in the fourth highest position in Indonesia. Meanwhile, in 2022, West Nusa Tenggara (NTB) Province recorded the highest percentage in Indonesia of toddlers aged less than 6 months who received exclusive breast milk, namely 79.69 percent. However, it cannot be concluded that the prevalence of stunting among children under five in NTB Province is low. Between districts/cities in NTB Province there are quite high disparities in the prevalence of stunting among children under five. This shows that there is a regional influence, so this research aims to describe the incidence of stunting in toddlers in general and identify the variables that influence it in West Nusa Tenggara (NTB) Province in 2022 using a multilevel binary regression model. The research results show that the variables of toddler's gender, toddler's age, history of toddler pneumonia, mother's education level, access to clean drinking water sources, access to adequate sanitation, and GRDP per capita have a significant effect on the incidence of stunting among toddlers in NTB Province in 2022

Analisis Kolerasi Antara Nilai Tukar Rupiah dan Indeks Harga Saham Gabungan (IHSG)

Riad Malik Fajar

This study aims to analyze the relationship between the Rupiah exchange rate against the United States Dollar (USD) and the Jakarta Composite Stock Price Index (JCI) in Indonesia using the latest data from January 2014 to December 2023. Through the Pearson correlation method, this study found a significant negative correlation between the Rupiah exchange rate and JCI, which shows that the weakening of the Rupiah tends to be followed by a decline in JCI. The results of this study provide important insights for investors, policymakers, and capital market practitioners in investment decision-making and economic policy.)

ANALISIS KORELASI PEARSON FAKTOR-FAKTOR YANG MEMPENGARUHI PERMINTAAN DAN PEMENUHAN KEBUTUHAN POKOK PEKERJA MIGRAN DI KOTA JAKARTA

Nada Zain Arofah

This research aims to measure the closeness of the linear relationship between demand for migrant workers in the City of Jakarta and the need for migrant workers in the City of Jakarta. This research uses quantitative methods. Data analysis techniques use descriptive methods and pearson correlation. The results of this research conclude that demand and basic needs based on the pearson correlation results are 0,260, which means that the level of relationship between demand and migrant workers is in the weak relationship category, because the significant level is 0,260 ≤ 0,05, ha is rejected and ho is accepted, so it can be concluded that there is no significant relationship between demand and migrant workers. The results of the pearson correlation test between the basic needs variable and migrant workers are 0,709, which means that the level of relationship between basic needs and migrant workers is a strong relationship, because the significant level is 0,709 ≤ 0,05, ha is rejected and ho is accepted, so it can be concluded that there is no significant relationship between basic needs and migrant workers.

Pengembangan MESI GUNDA (Game Edukasi Bangun Datar) Berbasis Android untuk Mendukung Kemampuan Pemecahan Masalah Matematis

Vita

Salah satu keterampilan yang perlu diberikan kepada siswa dalam pembelajaran matematika adalah kemampuan pemecahan masalah. Namun di MTs N 5 Magelang kemampuan pemecahan masalah matematis siswa masih rendah. Selain itu permasalahan yang dialami adalah kurangnya penggunaan media pembelajaran interaktif dan pemanfaatan teknologi. Tujuan penelitian ini adalah untuk mengembangkan dan menganalisis validitas, praktikalitas, dan efektivitas media pembelajaran MESI GUNDA (gaMe edukaSi banGun Datar) berbasis Android untuk menunjang keterampilan pemecahan masalah matematis pada materi bangunan datar. Penelitian ini merupakan jenis Penelitian dan Pengembangan (RnD) dengan model ADDIE yang memanfaatkan aplikasi Articulate Storyline, Canva, dan WEB2APK Builder. Analisis validitas menggunakan angket penilaian dari ahli media dan materi yang terdiri dari dua orang dosen dan satu orang guru untuk ahli media, sedangkan ahli materi dilakukan oleh satu orang dosen dan dua orang guru. Kepraktisan produk diukur dengan angket kepraktisan yang diisi oleh siswa dan guru berjumlah 27 siswa dan satu guru, sedangkan keefektifan dengan melihat peningkatan skor pre-test dan post-test sebanyak 23 siswa yang dianalisis menggunakan N- memperoleh. Hasil penelitian menunjukkan bahwa media MESI GUNDA berbasis Android valid, praktis, dan efektif untuk mendukung keterampilan pemecahan masalah matematika. MESI GUNDA memenuhi aspek valid dengan skor 90 dari 100 dengan kategori sangat valid oleh ahli media dan dari ahli materi diperoleh skor 56 dari 65 dengan kategori sangat valid. Media juga memenuhi aspek praktis dan efektif dengan skor 80,59 dari 100 dikategorikan sangat praktis dan nilai N-gain sebesar 0,32 dikategorikan sedang.

Exploration Mathematical Aesthetics Through Logical and Critical Thinking

Nurlatifah Lubis Lubis

Students are more likely to try to explore the steps of problem solving to obtain the correct answer when
solving problems related to angle bisectors. Although students can solve the problem correctly, they are not
necessarily able to explain the solution well. The form of problem solving given to students greatly influences
their thought process. This shows that the explanation given by students does not support their thinking
process. To overcome this situation, a cognitive process is needed that helps students to think logically and
critically. One simple effort that allows for such needs is the theory of ill-structured problem solving which
is seen as part of the aesthetic values of mathematics.
This study aims to describe the logical and critical thinking process of junior high school students in solving
ill-structured problems based on math ability. The subject of this study consisted of one student with high
mathematics ability. This study is an explorative research using a qualitative approach.
Supporting instruments for data collection are: 1) Test of Mathematical Ability (TKM) consisting of 10 items
in the form of descriptions to select subjects with high mathematical ability, 2) Ill-structured Problem Task
(TMI), 3) Interviewing the subject based on the task (TMI).
The data analyzed in this study are interview transcript data, document data and field notes. This study used
three stages in data analysis, namely data condensation, data display and conclusion drawing and
verification. To validate the findings, the author applied method triangulation until consistent data was
obtained, i.e. the data was structured and the content was relatively the same. Furthermore, consistent data in
this study is categorized as research data.
The results showed that the logical and critical thinking process of high mathematics ability students in
solving ill-structured problems consisted of: (1) problem representation;
(2) Generating Solution; (3) Justification; and (4) Monitoring and Evaluation. Based on the results of
research related to the exploration of mathematical aesthetics through logical and critical thinking, it is
recommended as material for further research development in terms of other aspects