https://journal.stats.id/index.php/ijsa/issue/feed Indonesian Journal of Statistics and Its Applications 2020-10-24T04:02:59+00:00 Agus M Soleh agusms@apps.ipb.ac.id Open Journal Systems <p><strong>Indonesian Journal of Statistics and Its Applications (<a href="http://issn.pdii.lipi.go.id/issn.cgi?daftar&amp;1510202061&amp;1&amp;&amp;2017">eISSN:2599-0802</a>)&nbsp;(formerly named <a href="https://journal.ipb.ac.id/index.php/statistika" target="_blank" rel="noopener">Forum Statistika dan Komputasi</a>),&nbsp;</strong><strong>established since 2017</strong><strong>, </strong>publishes scientific papers in the area of statistical science and the applications. The published papers should be research papers with, but not limited to, the following topics: experimental design and analysis, survey methods and analysis, operation research, data mining, statistical modeling, computational statistics, time series and econometrics, and statistics education.&nbsp;&nbsp; All papers were reviewed by peer reviewers consisting of experts and academicians across universities and agencies.&nbsp;This journal is <strong>nationally accredited&nbsp;(SINTA 3)</strong> by Directorate General of Research and Development Strengthening (DGRDS),&nbsp;Ministry of Research, Technology and Higher Education of the Republic of Indonesia No.: <a href="http://arjuna.ristekdikti.go.id/files/berita/Surat_Pemberitahuan_Hasil_Akreditasi_Jurnal_Ilmiah_Elektronik_Periode_III_Tahun_2019_dan_Lampiran.pdf" target="_blank" rel="noopener">14/E/KPT/2019, dated 10 May 2019</a>.&nbsp;</p> <p><strong>Scope:</strong><br>Indonesian Journal of Statistics and Its Applications is a refereed journal committed to the Statistics and its applications.</p> <p><strong>Issue</strong><em>&nbsp;</em><strong>Released</strong>:&nbsp;<em>28 February (No 1),&nbsp; 30 June (No 2), and 31 October (No 3).&nbsp;</em></p> https://journal.stats.id/index.php/ijsa/article/view/504 IMPLEMENTASI TRANSFORMASI FOURIER UNTUK TRANSFORMASI DOMAIN WAKTU KE DOMAIN FREKUENSI PADA LUARAN PURWARUPA ALAT PENDETEKSIAN GULA DARAH SECARA NON-INVASIF 2020-10-24T04:02:59+00:00 Umam Hidayaturrohman hidayaturrohman4@ymail.com Erfiani Erfiani erfiani_ipb@yahoo.com Farit M Afendi amsstk@gmail.com <p>Diabetes mellitus is the result of changes in the body caused by a decrease of insulin performance which is characterized by an increase of blood sugar level. Detection of blood sugar can be done with Invasive methods or non-invasive methods. However, non-invasive methods are considered better because they can check early, faster and accurate. The prototype output is values of intensity in the time domain, thus fourier transformation is very much needed to transform into the frequency domain. In this study, Fourier transformation methods used are Discrete Fourier Transform (DFT), Fast Fourier Transform Radix-2, and Fast Fourier Transform Radix-4. Evaluation for the best method is done by comparing the processing speed of each method. The FFT Radix-4 method is more effective to perform the transformation into the frequency domain. The average processing speed with the FFT Radix-4 method reaches 2.67×10<sup>5</sup> nanoseconds, and this is much faster 5.06×10<sup>6</sup> nanoseconds than the FFT Radix-2 method and 2.40×10<sup>7</sup> nanoseconds faster than the DFT method.</p> 2020-07-31T00:00:00+00:00 ##submission.copyrightStatement## https://journal.stats.id/index.php/ijsa/article/view/529 ON THE MODELLING OF LEPROSY PREVALENCE IN SOUTH SULAWESI USING SPATIAL AUTOREGRESSIVE MODEL 2020-10-24T04:02:52+00:00 Rezki Melany Sabil rezkimelany@bps.go.id Ray Sastri raysastri@stis.ac.id <p>The prevalence of leprosy is the number of leprosy cases per 10.000 peoples. Based on data from the Ministry of Health, the highest prevalenece of leprosy was in South Sulawesi. This is needs a special attention because leprosy is a contagious disease. The number of leprosy cases in an area may be influenced by the number of leprosy case in the neighbor area due to the movement of the air. So that, the location of&nbsp; area need to be included in analysis of leprosy. The aim of this study is to identify the variables that spatially affect the prevalence of leprosy in South Sulawesi and modelling it. This study uses&nbsp;data from the Ministry of Health for year 2016.&nbsp; The method of analysis is Spatial Autoregressive Model (SAR).&nbsp; The results is There is a positive spatial autocorrelation in the prevalence of leprosy in district level, which means that regions with high prevalence of leprosy are surrounded by areas with high prevalence of leprosy, and vice versa. The prevalence of leprosy in an area is influenced by the prevalence of leprosy in neighbor districts, the percentage of BCG vaccines recipient and the percentage of households with healthy lifestyle.</p> 2020-07-31T00:00:00+00:00 ##submission.copyrightStatement## https://journal.stats.id/index.php/ijsa/article/view/513 A REPEATED CROSS-SECTIONAL MODEL FOR ANALYZING UNEMPLOYMENT DATA IN BOGOR 2020-10-24T04:02:55+00:00 Ulfah Sulistyowati ulfah.sulistyowati@gmail.com Khairil Anwar Notodiputro khairil@apps.ipb.ac.id I Made Sumertajaya imsjaya@gmail.com <p>In general, the form of data encountered in statistical problems is panel data and cross-sectional data. There are times in certain conditions, the data formed in the form of a combination of panel data with cross-sectional data, which is commonly referred to as repeated cross-sectional data. Repeated cross-sectional data is often done in research with individual observations. In this study, a repeated cross-sectional analysis was carried out using a fixed influence model with observations in the form of an area (village) in Bogor, West Java to analyze unemployment factors. The results obtained are that ongoing village development affects the unemployment rate in Bogor</p> 2020-07-31T00:00:00+00:00 ##submission.copyrightStatement## https://journal.stats.id/index.php/ijsa/article/view/571 THE BIVARIATE EXTENSION OF AMOROSO DISTRIBUTION 2020-10-24T04:02:46+00:00 David Sam Jayakumar samjaya77@gmail.com A Sulthan sulthan90@gmail.com W Samuel wsamuel365@gmail.com <p>This paper introduces the bivariate extension of the amoroso distribution and its density function is expressed in terms of hyper-geometric function. The standard amoroso distribution, cumulative distribution functions, conditional distributions, and its moments are also derived. The Product moments, Co-variance, correlations, and Shannon’s differential entropy are also shown. Moreover, the generating functions such as moment, Cumulant, Characteristic functions are expressed in Fox-wright function, and the Survival, hazard, and Cumulative hazard functions are also computed. The special cases of the bivariate amoroso distribution are also discussed and nearly 780 bivariate mixtures of distributions can be derived. Finally, the two-dimensional probability surfaces are visualized for the selected special cases and we also showed the estimation of parameters by the method of maximum likelihood approach, and the constrained maximum likelihood approach is also computed by using Non-linear Programming with a numerical application</p> 2020-07-31T00:00:00+00:00 ##submission.copyrightStatement## https://journal.stats.id/index.php/ijsa/article/view/586 METODE ANALISIS DISKRIMINAN KUADRAT TERKECIL PARSIAL UNTUK KLASIFIKASI SEGMEN LOYALITAS KONSUMEN SUSU PERTUMBUHAN 2020-10-24T04:02:42+00:00 Herdina Kuswari herdinakuswari@gmail.com Farit Mochamad Afendi fmafendi@gmail.com Khairil Anwar Notodiputro khairilnotodiputro@gmail.com <p>Consumer segmentation is the process of dividing consumers into different segments based on consumer characteristics, making it easier for companies to develop marketing strategies. The segmentation is carried out based on consumer loyalty using the RFM (Recency, Frequency, Monetary) approach a number of 7753 members of a nutritional product loyalty program is considered in the analysis. Partial least square discriminant analysis classification modeling is built using the results of consumer segmentation being the a response variable. The model is&nbsp;not&nbsp;good&nbsp;enough&nbsp;based&nbsp;on the AUC (Area Under Curve) value of the&nbsp;ROC (Relative Operating Characteristic) curve&nbsp;that quite low&nbsp;for each&nbsp;segment. The explanatory variables that have high contribution to the model is X5, X9, and X2 with VIP (Variable Importance in the Projection) values more than 1.</p> 2020-07-31T00:00:00+00:00 ##submission.copyrightStatement## https://journal.stats.id/index.php/ijsa/article/view/603 IMPROVISASI MODEL ARIMAX-ANFIS DENGAN VARIASI KALENDER UNTUK PREDIKSI TOTAL TRANSAKSI NON-TUNAI 2020-10-24T04:02:34+00:00 Muhammad Luthfi Setiarno Putera m.luthfi@iain-palangkaraya.ac.id <p>Developed information technology boosts interest to use non-cash payment media in many areas. Following the high usage of a non-cash scheme in many payment transactions recently, the objective of this work is two-fold that is to predict the total of a non-cash transaction by using various time-series models and to compare the forecasting accuracy of those models. As a country with a mostly dense Moslem population, plenty of economical activities are arguably influenced by the Islamic calendar effect. Therefore the models being compared are ARIMA, ARIMA with Exogenous (ARIMAX), and a hybrid between ARIMAX and Adaptive Neuro-Fuzzy Inference Systems (ANFIS). By taking such calendar variation into account, the result shows that ARIMAX-ANFIS is the best method in predicting non-cash transactions since it produces lower MAPE. It is indicated that non-cash transaction increases significantly ahead of Ied Fitr occurrence and hits the peak in December. It demonstrates that the hybrid model can improve the accuracy performance of prediction.</p> 2020-07-31T00:00:00+00:00 ##submission.copyrightStatement## https://journal.stats.id/index.php/ijsa/article/view/634 PENGARUH TINDAK KORUPSI TERHADAP KEMISKINAN DI NEGARA-NEGARA ASIA TENGGARA DENGAN MODEL PANEL DATA 2020-10-24T04:02:27+00:00 Aditya Firman Baktiar adityafirmanb@gmail.com Herpanindra Fadhilah herpanindrafadhilah1@gmail.com Margareth Dwiyanti Simatupang mds1708@gmail.com Mula Warman rhyuuzaki@gmail.com Salsa Vira salsvir25@gmail.com Rani Nooraeni raninoor@stis.ac.id <p>Poverty is still being an issue all over the world. It also happens in Southeast Asia that mostly consists of developing countries that identic with high poverty rates. Countries in the world have tried to eradicate the problem of poverty, it's just that it can be hampered due to the high level of corruption. This study aims to look at suitable models and the relationship between corruption and poverty. The data source in this study is secondary data from ten countries in Southeast Asia from 2015 to 2018. Analysis of the data used in this study is panel data. The result obtained is a panel data regression model that is more suitable for modeling the effect of corruption on poverty in Southeast Asian countries is a fixed effect model. Based on the model, the corruption represented by Corruption Perception Index (CPI) and the poverty represented by Human Development Index (HDI) is directly proportional which means every increase in one unit of CPI will also increase the HDI score by 0.001443 unit.</p> 2020-07-31T00:00:00+00:00 ##submission.copyrightStatement## https://journal.stats.id/index.php/ijsa/article/view/640 ON HALF EXPONENTIAL POWER MODEL FOR THE FIRST TIME FAILURE OF POWER DISTRIBUTION TRANSFORMERS IN NIGERIA 2020-10-24T04:02:25+00:00 Akinlolu Olosunde akinolosunde@gmail.com Rowland Benjamin Ekpo ekporowland@gmail.com <p>Transformer failure is a major problem confronting the Nigerian power sector, hindering the transmission and distribution of electric power to various households, institutions, and industries. Many of these transformer developed problem due to the old age of the transformers, overloading, in-availability of technical expertise, poor maintenance culture, manufacturer's faults, just to mention few. The present research focuses on providing half exponential power model for the failure of already installed transformers, with respect to years of installation up to the time of the first failure, using secondary data from the south western part of Nigeria as a case study. The results obtained showed that half exponential power performed better in modeling the first time failure of power transformers. This was possible because of the present of shape parameter which gives flexibility to half exponential power when compared with a half normal distribution.</p> 2020-07-31T00:00:00+00:00 ##submission.copyrightStatement## https://journal.stats.id/index.php/ijsa/article/view/646 SOME PROPERTIES OF BETA TRANSMUTED DAGUM DISTRIBUTION WITH APPLICATIONS 2020-10-24T04:02:23+00:00 Ahmed Ali Hurairah hurairah69@yahoo.com Saeed A. Hassen amsstk@gmail.com <p>In this paper, we introduce a new family of continuous distributions called the beta transmuted Dagum distribution which extends the beta and transmuted familys. The genesis of the beta distribution and transmuted map is used to develop the so-called beta transmuted Dagum (BTD) distribution. The hazard function, moments, moment generating function, quantiles and stress-strength of the beta transmuted Dagum distribution (BTD) are provided and discussed in detail. The method of maximum likelihood estimation is used for estimating the model parameters. A simulation study is carried out to show the performance of the maximum likelihood estimate of parameters of the new distribution. The usefulness of the new model is illustrated through an application to a real data set.</p> 2020-07-31T00:00:00+00:00 ##submission.copyrightStatement## https://journal.stats.id/index.php/ijsa/article/view/662 PANEL COINTEGRATION ANALYSIS IN DETERMINING RELATIONSHIP OF AGRICULTURAL COMMODITY AND OIL FUEL PRICE IN INDONESIA 2020-10-24T04:02:20+00:00 Marizsa Herlina marizsaherlina@gmail.com <p>This paper contributes to explain the relationship between oil fuel prices, oil price, the exchange rates, and agricultural commodity prices in Indonesia by using panel cointegration. Thus, this paper studied the short- and long-run relationships between oil fuel prices, oil prices, exchange rates, and agricultural commodity prices using the panel cointegration and causality analysis on five main agricultural commodities in Indonesia (i.e. rice, beef, palm oil, red chili, and sugar). The study was conducted using weekly agricultural, oil fuel, oil prices, and exchange rates from October 2014 until May 2016. The results showed that the oil fuel prices and the exchange rate had a long-run impact on agricultural commodity prices. The direction of the causality had also been determined. The oil fuel prices, oil prices, and exchange rate altogether had a unidirectional Granger causality to all of the agricultural commodity prices except beef and palm oil prices in the long-run.</p> 2020-07-31T00:00:00+00:00 ##submission.copyrightStatement## https://journal.stats.id/index.php/ijsa/article/view/587 VARIABEL-VARIABEL YANG MEMENGARUHI WAKTU HINGGA SESEORANG MENGGUNAKAN NARKOBA PERTAMA KALI MENGGUNAKAN ANALISIS SURVIVAL 2020-10-24T04:02:40+00:00 Widya Larasati widya.larasati@bps.go.id Mohammad Dokhi dokhi@stis.ac.id <p>Indonesia is currently in a state of emergency of drugs because of its increasing abuse rate and its spread is widespread not only in big cities. The average of first drug use is in adolescence. This study aims to determine the variables that influence the time for someone to use drugs for the first time and the acceleration factor. The data analyzed by using Survival Analysis with the frailty variable is secondary data from BNN and Puslitkes UI survey. The result is, the average of first drug use in eight towns/districts of research locus was 18-year. Smoking, alcohol consumption, the environment, and gender are significant variables that influence the first drug use. A person who has smoked, use alcohol, lived in a drug-exposed environment, and male sex will have a resilient time not to use drugs faster with the acceleration factor of each variable are 0.3184, 0.3985, 0.3501, and 0.6773. The results conclude that regulations on cigarettes and alcohol need to be revisited since both influence drug initiation. In addition, prevention programs need to focus more on adolescents and young children so that they have strong self-defense from the influence of a drug-exposed environment.</p> 2020-07-31T00:00:00+00:00 ##submission.copyrightStatement## https://journal.stats.id/index.php/ijsa/article/view/600 STUDY ON EMD METHOD FOR PREDICTING THE PRICE OF CURLY RED CHILI IN INDONESIA 2020-10-24T04:02:36+00:00 Zilrahmi Zilrahmi zilrahmi@fmipa.unp.ac.id Hari Wijayanto hari_ipb@yahoo.com Farit M Afendi fmafendi@gmail.com Rizal Bakri rizal.bakri@stiem-bongaya.ac.id <p>The fluctuations of curly red chili price affect the inflation rate in Indonesia. So that, the basic characteristics of price movement and correctly prediction for curly red chili price become concern in various studies. Empirical Mode Decomposition (EMD) method helps to examine behavioral characteristics of curly red chili prices in Indonesia easily. Ensemble EMD (EEMD) and modified EEMD are the decomposition method of time series which is development of EMD method. The decomposed data with EMD methods can also used for price forecast. The forecasting with ARIMA and trend polynomial performed to assess the effect of decomposition with EMD methods for forecast stability of curly red chili price in Indonesia under various conditions. The results show the most influence factor for price fluctuation of curly red chili in Indonesia is season and growing season. In this case, the ability of a decomposition method to produce the actual components that describe the pattern of data signals affect the accuracy of the predicted value obtained using the model. The predicted value using the decomposed data by modified EEMD always better than EEMD on the overall condition.</p> 2020-07-31T00:00:00+00:00 ##submission.copyrightStatement## https://journal.stats.id/index.php/ijsa/article/view/607 PENGGEROMBOLAN DERET WAKTU DENGAN PENDEKATAN UKURAN KEMIRIPAN PICCOLO UNTUK PERAMALAN CURAH HUJAN PROVINSI BANTEN 2020-10-24T04:02:31+00:00 Sarah Fadhlia sarah.m.amin@gmail.com I Made Sumertajaya imsjaya.stk@gmail.com Anik Djuraidah anikdjuraidah@apps.ipb.ac.id <p>Time series data modeling can be done by modeling each object one by one. Monthly rainfall data is an example of time series data. The purpose of time series analysis is to find patterns of past data and then forecast the future characteristics of data. The data used in this study is the Banten Province rainfall data which contained 19 rainfall stations. So it will require 19 models to forecast the rainfall data. The pattern of time series data in Banten Province monthly rainfall data in several locations has similarities. So that the similarity of this pattern can be considered in the clusters. In time series clustering, the idea is to investigate the similarity of time series in a cluster. The accuracy of distance similarity size measurements is performed on the generation data generated from 3 models, namely AR (1), AR (2), and AR (3). The piccolo method has an average accuracy of 0.62. While the maharaj method has an average accuracy of 0.41. This means that the Ward hierarchical clustering method using the Piccolo distance approach has a greater accuracy value than the Maharaj distance approach. Furthermore, the Piccolo method can be used as an alternative to the excellent distance method for grouping time series data in case data. The Banten Province rainfall station has 3 optimal clusters. Modeling individual level and cluster level has accuracy values that are not much different.</p> 2020-07-31T00:00:00+00:00 ##submission.copyrightStatement## https://journal.stats.id/index.php/ijsa/article/view/555 PEMODELAN POISSON RIDGE REGRESSION (PRR) PADA BANYAK KEMATIAN BAYI DI JAWA TENGAH 2020-10-24T04:02:49+00:00 Wulandari Wulandari wulanda@bps.go.id <p>The decline of infant mortality is one of the targets of the Indonesian government in the health sector, including the Government of Central Java. To achieve this goal, it is necessary to identify factors that affect many infant mortalities in the district/city of Central Java. Infant mortalities are count data, so Poisson regression is commonly used. The data in the study showed the existence of multicollinearity in several predictor variables, so an appropriate model was needed. Poisson Ridge Regression (PRR) is a Poisson modeling that accommodates multicollinearity. In this study, the PRR model was used to model infant mortality in Central Java district/city. The results showed that the parameter estimation of the PRR model was slightly different than the estimated Poisson regression model. Modeling infant mortality with the PRR model, out of five predictor variables, three variables harmed many infant deaths, while the other two variables had a positive effect on many infant deaths.</p> 2020-07-31T00:00:00+00:00 ##submission.copyrightStatement##