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All Journal Pythagoras: Jurnal Matematika dan Pendidikan Matematika Jurnal Bisnis SIGMA: Jurnal Pendidikan Matematika Desimal: Jurnal Matematika Pendas : Jurnah Ilmiah Pendidikan Dasar Prosiding Seminar Nasional Darmajaya Jurnal Bisnis Darmajaya Jurnal Ekonomi dan Manajemen J-PiMat : Jurnal Pendidikan Matematika Journal of Mathematics Education and Science Jurnal Dharma Bhakti Ekuitas TEACHING : Jurnal Inovasi Keguruan dan Ilmu Pendidikan LEARNING : Jurnal Inovasi Penelitian Pendidikan dan Pembelajaran Mathematics and Applications (MAp) Journal Indo-MathEdu Intellectuals Journal Formosa Journal of Multidisciplinary Research (FJMR) Al-Irsyad Journal of Mathematics Education Lemma: Letters of Mathematics Education
Ana Risqa JL
Universitas Islam Negeri Raden Intan Lampung
Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Mathematics Social Sciences Other

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Forecasting Fluctuating Salt Product Demand Using ARIMAX with Price-Based Exogenous Information Lutfiyah, Lufi; Rinaldi, Achi; JL, Ana Risqa
Desimal: Jurnal Matematika Vol. 9 No. 2 (2026): Desimal
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/

Abstract

Accurate demand forecasting is essential for salt-processing enterprises because fluctuating demand can affect production planning, inventory control, and distribution efficiency. This study examines the demand for table salt products at CV Restu Ibu by applying the Autoregressive Integrated Moving Average with Exogenous Variables (ARIMAX) model using product price as an external predictor. Monthly sales and price data for 1 kg, 2 kg, and 4 kg packaging sizes from January 2018 to December 2025 were analyzed through the Box–Jenkins procedure, including stationarity testing, model identification, parameter estimation, diagnostic checking, forecast evaluation, and projection for 2026–2028. The results show that all demand series became stationary after first-order differencing. The best models were ARIMAX (2,1,1) for the 1 kg product, ARIMAX (1,1,1) for the 2 kg product, and ARIMAX (0,1,1) for the 4 kg product. Diagnostic testing using the Ljung–Box test confirmed that all selected models satisfied the white-noise residual assumption. The forecasting accuracy was excellent, with Mean Absolute Percentage Error values of 2.363%, 2.824%, and 1.559%, respectively. The forecast results indicate a declining demand trend for the 1 kg product, an increasing trend for the 2 kg product, and a fluctuating pattern for the 4 kg product. These findings demonstrate that incorporating price information improves the representation of demand dynamics and supports product-specific forecasting for price-sensitive salt products. The study also confirms that packaging size produces heterogeneous demand behavior, making differentiated forecasting more appropriate than a single aggregate demand model in practice.
KORELASI SELF-CONFIDENCE DAN LITERASI NUMERASI TERHADAP KEMAMPUAN ANALISIS SERTA DAMPAKNYA PADA KEMAMPUAN PEMECAHAN MASALAH MATEMATIS Fertika Dwi Hijayati; Bambang Sri Anggoro; Ana Risqa JL
Al-Irsyad Journal of Mathematics Education Vol 5 No 2 (2026): AL–IRSYAD JOURNAL OF MATHEMATICS EDUCATION
Publisher : Sekolah Tinggi Keguruan dan Ilmu Pendidikan Darud Da'wah Wal Irsyad Pinrang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58917/ijme.v5i2.800

Abstract

Proses pembelajaran matematika berpotensi mengembangkan rasa percaya diri, memahami soal berbasis literasi numerasi, serta melatih kemampuan menganalisis dan menyelesaikan masalah secara logis dan rasional. Penelitian ini bertujuan untuk mengetahui seberapa besar pengaruh yang diberikan antara self-confidence dan literasi numerasi terhadap kemampuan pemecahan masalah melalu variabel intervening yaitu analisis matematis bagi siswa SMA Negeri 1 Seputih Mataram. Metode penelitian menggunakan survei dengan pendekatan kausal dan analisis jalur dengan semua variabel bersifat numerik. Hasil penelitian dari 143 sampel mununjukkan bahwa self-confidence dan literasi numerasi memberi pengaruh melalui kemampuan analisis matematis sehingga mampu menjelaskan kemampuan pemecahan masalah matematis sebesar . Analisis matematis berperan sebagai mediator yang memperkuat kemampuan pemecahan masalah siswa. Dengan demikian, peningkatan self-confidence dan literasi numerasi dapat meningkatkan kemampuan analisis serta berdampak pada kemampuan pemecahan masalah matematis siswa.
ANALISIS MANOVA: STRATEGI GAME BASED LEARNING UNTUK MENINGKATKAN KEMAMPUAN BERPIKIR KREATIF DAN PEMECAHAN MASALAH MATEMATIS DITINJAU DARI MINAT BELAJAR PESERTA DIDIK Batin Saputra, Adi; Andriani, Siska; Risqa JL, Ana
Pendas : Jurnal Ilmiah Pendidikan Dasar Vol. 11 No. 02 (2026): Volume 11 No. 2, Juni 2026 Release
Publisher : Program Studi Pendidikan Guru Sekolah Dasar FKIP Universitas Pasundan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23969/jp.v11i02.52707

Abstract

This study aims to analyze the effect of the Game Based Learning strategy on students’ creative thinking and mathematical problem-solving skills in terms of their learning interest, using MANOVA analysis. The background of this research is based on the fact that students’ ability to solve mathematical problems creatively is still low, as well as the lack of learning variations that can actively enhance students’ learning interest. This study employs a quantitative approach with a Quasi-Experimental Design. The research subjects were seventh grade students at SMP Negeri 21 Bandar Lampung, consisting of an experimental class and a control class. Data analysis was conducted using two-way MANOVA with Pillai’s Trace test. The MANOVA analysis results show that the Game Based Learning strategy is effective in improving students' creative thinking and mathematical problem solving skills. Learning interest also has an effect; however, no significant interaction was found between the two, indicating that Game Based Learning is effective across all levels of learning interest.
Co-Authors Achi Rinaldi Alda, Trilisa Anindhita, Wike Arini Alhaq Bambang Sri Anggoro Batin Saputra, Adi Fertika Dwi Hijayati Indriani, Wiwid Afma Kholis, Arief Wildan Lutfiyah, Lufi Nanang Supriadi Netriwati Novian Riskiana Dewi Putri, Aisyah Sabila Rahmita, Nela Riyama Ambarwati Rizki Wahyu Yunian Putra SANIAH, RATNA Sari, Anggun Lupita Siska Andriani Siti Ulfa Nabila Sri Purwanti Nasution, Sri Purwanti Trilisa Alda Tuti Maryani Veithzal Rivai Zainal Viola De Yusa Viola De Yusa Wahyu Hidayat Tullah Yusa, Viola De Yusa, Viola De