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All Journal MATAPPA: Jurnal Pengabdian Kepada Masyarakat Inferensi PENGABDI: Jurnal Hasil Pengabdian Masyarakat
Sudarmin Sudarmin
UNiversitas Negeri Makassar
Agriculture, Biological Sciences & Forestry Humanities Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Engineering Mathematics Social Sciences Other

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Evaluating the Performance of Zero-Inflated and Hurdle Poisson Models for Modeling Overdispersion in Count Data Aswi Aswi; Sri Ayu Astuti; Sudarmin Sudarmin
Inferensi Vol 5, No 1 (2022): Inferensi
Publisher : Department of Statistics ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j27213862.v5i1.12422

Abstract

A Poisson regression model is commonly used to model count data. The Poisson model assumes equidispersion, that is, the mean is equal to the variance. This assumption is often violated. In count data, overdispersion (the variance is larger than the mean) occurs frequently due to excessive zeroes in the response variable. Zero-inflated Poisson (ZIP) and Hurdle models are commonly used to fit data with excessive zeros. Although some studies have compared the ZIP and Hurdle models, the results are inconsistent. This paper aims to evaluate the performance of ZIP and Hurdle Poisson models for overdispersion data through both simulation study and real data. Data were simulated with three different sample sizes, six different means, and three different probabilities of zero with 500 replications. Model goodness-of-fit measures were compared by using Akaike Information Criteria (AIC). Overall, the ZIP model performed relatively the same or better than the Hurdle Poisson model under different scenarios, but both ZIP and Hurdle models are better than the standard Poisson model for overdispersion in count data.
Pelatihan Analisis Spasial Menggunakan R Studio Aswi Aswi; Bobby Poerwanto; Sudarmin Sudarmin
MATAPPA: Jurnal Pengabdian Kepada Masyarakat Volume 5 Nomor 1 Tahun 2022
Publisher : STKIP Andi Matappa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31100/matappa.v5i1.1396

Abstract

Pelatihan ini bertujuan untuk melatih para peserta melakukan analisis spasial dengan menggunakan software R Studio. Dalam pelaksanaannya, kegiatan terdiri dari 3 sesi yaitu sesi pendampingan instalasi software, pemberian materi, dan tanya jawab. Umpan balik yang diberikan peserta dalam hal kesesuaian materi dengan kebutuhan, kemudahan penerapan materi, sistematika penyampaian materi, dan penguasaan materi narasumber juga sangat baik.
Metodologi Penelitian dan Teknik Analisis Data Muh. Arif Tiro; Muh. Nusrang; Sudarmin Sudarmin
PENGABDI PENGABDI : VOL. 1, NO. 2 (2020)
Publisher : Universitas Negeri Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26858/pengabdi.v1i2.15766

Abstract

Mitra Program Kemitraan Masyarakat (PKM) ini adalah guru di SMAN 4 Kabupaten Pinrang. Masalahnya adalah: (1) Rendahnya pemahaman guru tentang membuat rencana, pelaksanaan dan pelaporan penelitian, 2). Rendahnya pemahaman guru dalam menulis artikel ilmiah, serta 3). Rendahnya pemahaman guru terkait metode analisis data yang akan digunakan.. Metode yang digunakan adalah: memberikan workshop pemahaman terkait metodologi penelitian dan teknik analisis data. Hasil yang dicapai adalah (1) Guru Mampu membuat artikel ilmiah dengan baik dan benar, 2). Guru lebih memahami langkah-langkah dalam melakukan penelitian, 3). Publikasi pada jurnal nasional.
Co-Authors Aswi, Aswi Bobby Poerwanto Muh. Arif Tiro Muh. Nusrang Sri Ayu Astuti