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All Journal Desimal: Jurnal Matematika BAREKENG: Jurnal Ilmu Matematika dan Terapan Buguh: Jurnal Pengabdian Kepada Masyarakat International Journal of Electronics and Communications Systems Jurnal Siger Matematika
Saidi, Subian
Jurusan Matematika, FMIPA, Universitas Lampung
Humanities Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Mathematics Mechanical Engineering Physics Social Sciences Transportation

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RIDGE LEAST ABSOLUTE DEVIATION PERFORMANCE IN ADDRESSING MULTICOLLINEARITY AND DIFFERENT LEVELS OF OUTLIER SIMULTANEOUSLY Herawati, Netti; Saidi, Subian; Azis, Dorrah
BAREKENG: Jurnal Ilmu Matematika dan Terapan Vol 16 No 3 (2022): BAREKENG: Journal of Mathematics and Its Applications
Publisher : PATTIMURA UNIVERSITY

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (481.598 KB) | DOI: 10.30598/barekengvol16iss3pp779-786

Abstract

If there is multicollinearity and outliers in the data, the inference about parameter estimation in the LS method will deviate due to the inefficiency of this method in estimating. To overcome these two problems simultaneously, it can be done using robust regression, one of which is ridge least absolute deviation method. This study aims to evaluate the performance of the ridge least absolute deviation method in surmounting multicollinearity in divers sample sizes and percentage of outliers using simulation data. The Monte Carlo study was designed in a multiple regression model with multicollinearity (ρ=0.99) between variables and and outliers 10%, 20%, 30% on response variables with different sample sizes (n = 25, 50,75,100,200; =0, and β=1 otherwise). The existence of multicollinearity in the data is done by calculating the correlation value between the independent variables and the VIF value. Outlier detection is done by using boxplot. Parameter estimation was carried out using the RLAD and LS methods. Furthermore, a comparison of the MSE values of the two methods is carried out to see which method is better in overcoming multicollinearity and outliers. The results showed that RLAD had a lower MSE than LS. This signifies that RLAD is more precise in estimating the regression coefficients for each sample size and various outlier levels studied.
PELATIHAN STATISTIKA DESKRIPTIF UNTUK DATA ADMINISTRATIF DESA DI KECAMATAN TANJUNG RAJA KABUPATEN LAMPUNG UTARA saidi, subian; Netti Herawat; Misgiyati; Khoirin Nisa; Agus Sutrisno
BUGUH: JURNAL PENGABDIAN KEPADA MASYARAKAT Vol. 6 No. 1 (2026): Maret 2026
Publisher : Badan Pelaksana Kuliah Kerja Nyata Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/buguh.v6n1.3385

Abstract

Data administratif merupakan kumpulan data yang memiliki sifat nyata tentang sesuatu yang dianggap penting dan disimpan secara sistematis dalam sebuah sistem untuk mendapatkan suatu informasi tentang suatu hal yang berhubungan dalam ruang lingkup tertentu. Catatan administrasi Desa yang dikumpulkan mempunyai tujuan pengambilan keputusan tertentu, sehingga adanya satuan identitas yang memiliki kesesuaian dengan catatan tertentu sangat penting. Perlu dilakukan analisis terhadap data yang sudah diperoleh. Tujuannya adalah agar masyarakat dapat melihat gambaran jelas terkait data yang diperoleh dan juga memudahkan perangkat Desa untuk mengambil keputusan terkait kebijakan yang akan diambil. Oleh karena itu akan dilakukan pelatihan dan sosialisasi terkait pelatihan analisis data deskriptif bagi perangkat desa di kecamatan Tanjung Raja kabupaten Lampung Utara. Sehingga diharapkan kedepannya gambaran terkait data dapat dipublikasikan dalam bentuk yang mudah untuk dipahami yaitu dengan statistika deskrptif.
Co-Authors Aang Nuryaman Agus Sutrisno Ahmad Faisol Anisa Mulyani Ayu Febriani Azis, Dorrah Azzahra Zatil Irfani Dea Kusniar Dorrah Azis Eri Setiawan Eri Setiawan Eri Setiawan Eri Setiawan Febi Eka Febriansyah Ferdinandus Ivanelian Jodie Tori Khoirin Nisa Khoirin Nisa Khoirin Nisa La Zakaria Mariska, Yomi Misgiyati Muhamad Yoga Muhammad Luthfi Muhammad Ridho Pratama Muharramah, Ulfah Netti Herawat Netti Herawati Netti Herawati Netti Herawati Netti Herawati Netti Herawati Nusyirwan Nusyirwan Pratama, Rinaldo Adi Ruby, Triyono Rudi Ruswandi Sofalina Nodra Brilliantya Sutrisno, Agus Tiryono Ruby Tiryono Ruby Triyono Ruby Ulfah Muharramah Yomi Mariska Yusuf Perdana Zakaria, La Zatti Alikum