Articles

ESTIMASI PARAMETER DISTRIBUSI WEIBULL DUA PARAMETER MENGGUNAKAN METODE BAYES Hazhiah, Indria Tsani; Sugito, Sugito; Rahmawati, Rita
MEDIA STATISTIKA Vol 5, No 1 (2012): Media Statistika
Publisher : Jurusan Statistika FSM Undip

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Abstract

Interval estimation of a parameter is one part of statistical inference. One of the methods that used is the Bayes method. A Bayesian method is combine prior distribution and distribution of samples, so that the posterior distribution can be obtained. Interval estimation using a method Bayes called credibel interval estimation. In this thesis, the distribution of the sample is used a two-parameter Weibull distribution scale-shape-version of survival distribution (reliability). Data that used are data that is not censored data type and data type II censored if prior distribution using non-informative which of the produce distribution the resulting posterior distribution is gamma distribution. Parameters of the sample distribution that to find out is a parameter that  by the parameter c (shape parameter) known while the parameter b (scale parameter) had unknown. Keywords: Bayes Method, Two-Parameters Weibull Distribution , Gamma Distribution, The Estimated Credible Interval.
PENELUSURAN KERAGAMAN DALAM BLOK PADA RANCANGAN ACAK KELOMPOK DENGAN INTERGRADIEN Rahmawati, Rita
MEDIA STATISTIKA Vol 1, No 2 (2008): Media Statistika
Publisher : Jurusan Statistika FSM Undip

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Abstract

Dalam Rancangan Acak Kelompok Lengkap (RAKL), asumsi terpenting adalah unit percobaan dalam blok harus bersifat homogen. Asumsi ini sulit dipenuhi jika ukuran blok terlalu besar. Penelitian ini bertujuan untuk menelusuri keragaman yang ada dalam blok dengan memasukkan unsur arah keragaman (baris atau kolom dalam blok) yang mungkin ada, sehingga analisis ragam yang kemudian dihasilkan akan memberikan keragaman galat yang lebih kecil. Penelusuran keragaman dengan cara ini disebut analisis Intergradien. Dalam penelitian ini digunakan data jumlah anakan produktif/rumpun yang diperoleh dari Balai Tanaman Padi Sukamandi dalam Penelitian Interaksi antara Genotipe dengan Lingkungan Galur Harapan Padi Sawah pada Agroklimat Utama. Hasil dari penelitian ini, juga dengan data simulasi, memberi kesimpulan bahwa analisis Intergradien dalam RAKL menghasilkan kuadrat tengah galat (KTG) yang lebih kecil daripada RAKL biasa. Tetapi karena unsur baris dan arah keragaman pada data jumlah anakan produktif/rumpun tidak berpengaruh nyata pada alpha 5%, maka digunakan RAKL biasa untuk menentukan varietas terbaik. Dengan RAKL, didapatkan IR71031 memiliki jumlah anakan produktif/rumpun yang paling besar.
REGRESI TERBOBOTI GEOGRAFIS DENGAN PEMBOBOT KERNEL KUADRAT GANDA UNTUK DATA KEMISKINAN DI KABUPATEN JEMBER Rahmawati, Rita; Djuraidah, Anik
FORUM STATISTIKA DAN KOMPUTASI Vol 15, No 2 (2010)
Publisher : FORUM STATISTIKA DAN KOMPUTASI

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Abstract

The determination of whether  rural areas are considered  poor or no are usually based on  the average cost per capita with a global analysis that needs independent observations and the results are applied to all villages. But it is very likely that poverty would be influenced by space and neighboring areas, so the data between observations are rarely independent. One of the statistical analysis that encounters this spatial problem is Geographically Weighted Regression (GWR), which  gives different weights to each geographical observation. In this paper, the weighting used for the GWR model is kernel bi-square, with its bandwidth values respectively. Optimal bandwidth can be obtained by minimizing the value of cross validation coefficient (CV). The results showed that the GWR model is more effective than the regression to analyze the data on average expenditure per capita in Jember.
Pengetahuan Lokal Masyarakat Adat Kasepuhan: Adaptasi, Konflik dan Dinamika Sosio-Ekologis Rahmawati, Rita; Idris Gentini, Dian E
Jurnal Sodality Vol 2, No 2 (2008)
Publisher : Departemen SKPM FEMA IPB

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Abstract

Masyarakat Kasepuhan merupakan masyarakat adat Sunda yang hidup di sekitar Taman Nasional Gunung Halimun - Salak (TNGHS). Masyarakat adat ini mempunyai kekhasan dalam mengatur kehidupan warganya dalam berelasi dengan alam. Melalui konsep pancer pangawinan masyarakat mensandarkan kehidupannya pada keterikatan atas tanah. Permasalahannya sekarang adalah sejak diterbitkannya kebijakan perluasan Taman Nasional melalui SK Menteri Kehutanan Nomor 175/Kpts-II/2003, tanah yang dulu dikuasai oleh masyarakat berubah status menjadi tanah Taman Nasional. Perubahan status tanah tersebut menyebabkan hilangnya akses masyarakat terhadap tanah. Kondisi ini menempatkan masyarakat pada kondisi konflik dengan Pengelola TNGHS. Metode penelitian ini adalah kualitatif dengan paradigma konstruktivisme (Denzin, 2000). Teknik pengumpulan data melalui indepth interview, observasi partisipan, dan Focus Group Discussion (FGD). Hasil dan temuan penelitian menunjukkan adanya pengetahuan lokal masyarakat Kasepuhan dalam hal mengatur kelestarian lingkungan dan bagaimana lingkungan tersebut dapat memberi manfaat untuk kehidupan masyarakat. Misalkan dengan adanya konsep Ibu Bumi, Bapak Langit dan Guru Mangsa, Leuit dan Wewengkon Hutan. Pengetahuan ini telah dikembangkan secara turun temurun dan mengatur relasi masyarakat dengan alam (hutan). Namun pertarungan pengetahuan masyarakat lokal dan pengelola TNGHS telah menyebabkan teralienasinya pengetahuan lokal tersebut. Dengan mengacu pada konsep Escobar (1999), maka dapat disimpulkan bahwa pengetahuan lokal dalam mengelola sumber daya alam dapat dipandang sebagai rezim alam organik, dimana sejak diberlakukannya SK Menteri Kehutanan tentang perluasan TNGHS, masyarakat lokal dengan alam organiknya sedang berhadapan dengan pengelola TNGHS selaku rezim alam negara yang dalam prakteknya bertumpu pada pengetahuan kapitalis dan tekno, dalam memperjuangkan hak akses atas tanah.
FAKTOR-FAKTOR YANG MEMENGARUHI PRESTASI BELAJAR SISWA BOARDING SCHOOL MAN 1 SURAKARTA Rahmawati, Rita; Siswandari, -; Ivada, Elvia
Jupe-Jurnal Pendidikan Ekonomi Vol 1, No 2 (2013): Jurnal Pendidikan Ekonomi (JUPE)
Publisher : Jupe-Jurnal Pendidikan Ekonomi

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Abstract

ABSTRAK Tujuan penelitian ini adalah untuk mengetahui faktor-faktor yang memengaruhi prestasi belajar siswa boarding school MAN 1 Surakarta. Penelitian ini menggunakan metode deskriptif kuantitatif. Populasi dalam penelitian ini berjumlah 198 siswa. Sampel yang digunakan adalah sebanyak 140 responden. Penentuan jumlah sampel menggunakan teknik sampling proportionate stratified random. Teknik pengumpulan data menggunakan angket dan dokumentasi. Teknik analisis data menggunakan exploratory factor analysis. Berdasarkan hasil analisis data dan pembahasan dapat disimpulkan bahwa terdapat 13 faktor yang dapat memengaruhi prestasi belajar siswa boarding school di MAN 1 Surakarta tahun 2013. Dari ketigabelas faktor yang paling besar memengaruhi prestasi belajar siswa boarding school MAN 1 Surakarta adalah faktor pendekatan dalam proses pembelajaran, karena faktor ini memiliki percentage of variance hingga 17,393%. Kata kunci: analisis faktor, prestasi belajar, boarding school, metode deskriptif kuantitatif ABSTRACT The purpose of this study is to determine factors that affect boarding school student achievement MAN 1 Surakarta. This research used descriptive quantitative method. The population in this study were boarding school students at MAN 1 Surakarta in 2013, which amounts to 198 students. Number of samples taken is 140 respondents. The sampling technique used in this study was proportionate stratified random. Techniques of data collection using questionnaires and documentation. The data analysis technique used was the exploratory factor analysis. Based on the results of the data analysis and discussion, it can be concluded that there are 13 factors that can affect boarding school student achievement MAN 1 Surakarta in 2013. From the thirteen factor which influence boarding school student achievement at MAN 1 Surakarta, the biggest factor is the learning process approach, because these factors have a percentage of variance up to 17.393%.   Keywords: factor analysis, student achievement, boarding school, descriptive quantitative method
PENENTUAN FAKTOR PRIORITAS MAHASISWA DALAM MEMILIH TELEPON SELULER MERK BLACKBERRY DENGAN FUZZY AHP Shega, Hanien Nia H; Rahmawati, Rita; Yasin, Hasbi
Jurnal Gaussian Vol 1, No 1 (2012): Wisuda Periode Oktober 2012
Publisher : Jurusan Statistika UNDIP

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Abstract

This study aims to determine the priority factor Diponegoro University students in choosing a BlackBerry mobile phone brands. Consumer or buyer is often confused in making the decision to buy a product because of the many factors that affect the choices available. From the method of Analytic Hierarchy Process (AHP) was found to be too subjective assessment of uncertainty for qualitative data. The problems above can be solved by the method of Fuzzy Analytic Hierarchy Process (FAHP), which uses the interval so that the assessment of qualitative data can provide a more objective assessment. The criteria used to be in this research are quality, price, design, and service. The data were taken by spreading questionnaires. From the answer of respondent, calculation of ratio was performed with a consistency ratio (CR). If CR<0.10 it means the answer of respondent is consisten and can be used for Fuzzy AHP. Based on the result of research, it could be concluded that quality was the top priority with 0.278 priority weights, then the service with 0.254 priority weights, design with 0.240 priority weight, and price with 0.228 priority weights.
PEMBANGKITAN SAMPEL RANDOM MENGGUNAKAN ALGORITMA METROPOLIS-HASTINGS Irwanti, Lies Kurnia; Mukid, Moch. Abdul; Rahmawati, Rita
Jurnal Gaussian Vol 1, No 1 (2012): Wisuda Periode Oktober 2012
Publisher : Jurusan Statistika UNDIP

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Generating random samples can be done directly and indirectly using simulation techniques. This final project will discuss the process of generating random samples and estimate the parameters using an indirect simulation. Indirect simulation techniques used if the target distribution has a complicated shape and high dimension of density functions. Markov Chain Monte Carlo (MCMC) simulation is a solution to do it. One of the algorithms that is commonly used is Metropolis-Hastings. This algorithm uses the mechanism of acceptance and rejection to generate a sequence of random samples. In the example to be discussed, Metropolis-Hastings algorithm is applied to generate random samples of Beta distribution and also estimate the parameter value of the Poisson distribution using a proposal distribution random-walk Metropolis.
ESTIMASI KANDUNGAN HASIL TAMBANG MENGGUNAKAN ORDINARY INDICATOR KRIGING Awali, Aldila Abid; Yasin, Hasbi; Rahmawati, Rita
Jurnal Gaussian Vol 2, No 1 (2013): Wisuda Periode Januari 2013
Publisher : Jurusan Statistika UNDIP

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Abstract

Kriging is a geostatistical analysis of the data used to estimate the value that represents a no sample point based sample point in the surrounding by considering the spatial correlation in the data. Kriging is an interpolation method that generates unbiased predictions or estimations and has a minimum error. Indicator kriging is an estimation method that does not require the assumption of normality of data and can also be used to treat data that have a significant outlier. The indicator kriging that based on the principle of ordinary kriging also called ordinary indicator kriging. In this case study conducted Morowali estimated iron content in Central Sulawesi using ordinary indicator kriging method. The data used in the form of data coordinate point and iron content. The results obtained are presented probability value locations that fall within the zone of potential and non potential with the value the error variance. Based on the analysis to obtain a plot depicting the location of the entry in the zones of potential iron mine on the abscissa coordinate (7150–7210), the ordinate (54180–54540), and the depth ranges (440–500) meters and also the coordinates of the abscissa (7710–8130), the ordinate (54800–54960), and depths ranging from (327–342) meters.
ANALISIS FAKTOR-FAKTOR YANG MEMPENGARUHI GIZI BURUK BALITA DI JAWA TENGAH DENGAN METODE SPATIAL DURBIN MODEL Ramadani, Ikha Rizky; Rahmawati, Rita; Hoyyi, Abdul
Jurnal Gaussian Vol 2, No 4 (2013): Wisuda Periode Oktober 2013
Publisher : Jurusan Statistika UNDIP

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Severe malnutrition is a state of nutritional deficiencies at a severe level, where the nutritional status is far below the standard. Anyone can suffer from severe malnutrition, especially infants and children who are in the growth period. Central Java Province is one of many provinces in Indonesia where the cases of severe malnourished children under five years are high enough. It is noted that Central Java Province is one of 10 provinces in Indonesia with the highest rate of severe malnutrition cases for 6 years (2005-2010). Using data from year 2011, the result of the Moran’s I test states that there are spatial dependencies on severe malnutrition’s rate of children under five years and some of its influential factors on Central Java Province. Therefore, Spatial Durbin Model (SDM) method is used in this experiment. Variables which significantly affect severe malnutrition on Central Java Province through SDM method are : the numbers of infants with low birth weight ( ), the numbers of houses with good health status ( ), and the numbers of households with access to source of clean water ( ). SDM model obtains value of  as much as 70.3% with AIC and MSE respectively 476.32 and 35280.11, results better than Ordinary Least Square (OLS) which produce  as much as 41.5% with AIC 490.52 and MSE 60653.693
SEGMENTASI PASAR PADA PUSAT PERBELANJAAN MENGGUNAKAN FUZZY C-MEANS (STUDI KASUS: RITA PASARAYA CILACAP) Megawati, Nurhikmah; Mukid, Moch. Abdul; Rahmawati, Rita
Jurnal Gaussian Vol 2, No 4 (2013): Wisuda Periode Oktober 2013
Publisher : Jurusan Statistika UNDIP

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RITA Pasaraya Cilacap is the first supermarket in Cilacap. Previously, RITA Pasaraya become a shopping center for all people in Cilacap. Now, more and more supermarket is standing. To find this target, RITA Pasaraya needs grouping or market segmentation. Grouping method used  fuzzy cluster means (FCM). For an optimal cluster number using the accuracy of the measurement criteria is Xie Beni Index. Research data obtained by questionnaire on RITA Pasaraya Cilacap with 10 psikografik variables. Results of the research, consumer segmentation more accurate if grouped into 2 clusters. The final result is respondents in cluster 1 more attention to low price levels, complete goods, big discounts, satisfactory service, strategic location, roomy parking, comfortable for shopping, adequate public facilities, complete payment facilities, and cleaner room than to respondents in cluster 2. Basically, similar profiles cluster in cluster 1 and cluster 2. Mainly RITA Cilacap Supermarkets are women, with the range age of 16-29 years, with a frequency of shopping 2-4 times per month. Only last education and income are different. In cluster 1, dominated b senior high school with income of 2-5 million every month,  and in  cluster 2 dominated by  bachelor with income <2 million every month.
Co-Authors - Siswandari Abd. Rahman, Ika Marlina Abdul Hoyyi Abdur Rofiq, Abdur Afa, Ihdayani Banun Agung Santoso, Agung Agus Rusgiyono Agus Setiawan Agustifa Zea Tazliqoh Agustini Agustini, Agustini Alan Prahutama Aldila Abid Awali Alfahari Anggoro, Alfahari Allima Stefiana Insani Amri, Chairul Anggita Puri Savitri, Anggita Puri Anggraini Susanti Kusumawardani Anik Djuraidah Anton Suhartono, Anton Apriliyani, Neng Virly Asep Yoyo Wardaya Asmuni Hayat Aulia Ikhsan Betha Noranita Bhinekawati, Henny Budi Warsito Chrysmandini Pulung Gumauti, Chrysmandini Pulung Chyntia Arum Widyastusti, Chyntia Arum Daniyati, Dian Dedy Douglas Harianja, Dedy Douglas Denny Hernawan, Denny Diah Safitri Dian E Idris Gentini Dina Rosmalia Listya Utami Dwi Ispriyanti Ebeit Devita Simatupang Eko Adi Sarwoko Elvia Ivada Erfan Sofha, Erfan Esti Zaduqisti Fajar Heru Setiawan, Fajar Heru Fandi Ahmad Fikri, Aan Maudlihul Firda Megawati, Firda Firmansyah, Rafiek Fitrian Fariz Ichsandi Ginung Pratidina Gustomi, Mono Pratiko Hafii Risalam, Hafii Halawi, Dea Hilmiah Hanien Nia H Shega Hasbi Yasin Husen, Sadam Ikha Rizky Ramadani Indria Tsani Hazhiah Kartono Kartono Kristina, Lulu Lesmana, Wira Lies Kurnia Irwanti Luthfie, Muhammad M. Muslih Husein Maharani Febriana Putri, Maharani Febriana Marinda. W, Vuvud Maslachah, Maslachah Maulana, Irvan Mega Susilowati, Mega Melati Puspa Nur Fadlilah, Melati Puspa Nur Moch. Abdul Mukid Mohammad Yahya Muhammad Abid Muhyidin Muhammad Hilman Rizki Abdullah, Muhammad Hilman Rizki Muhammad Yusuf Muhimmi, Aliyatul Mumaiyizah, Mumaiyizah Munispa, Siti Mustafid Mustafid Mutiara Ardin Rifkiani, Mutiara Ardin Nariswari Diwangkari, Nariswari Nerustia, Arinda Novpika Niken Anggraini Dewi Novian Trianggara, Novian Novie Eriska Aritonang, Novie Eriska Nurhikmah Megawati Nuril Faiz Nurmila, Samhatul Octafinnanda Ummu Fairuzdhiya Pratama Ganang Widayaka, Pratama Ganang Purnamasari, Irma Rahayu Ningtyas Riana Ikadianti, Riana Rifki Adi Pamungkas, Rifki Adi Rindayati, Rindayati Riyan Eko Putri Rizki Taher Dwi Kurniawati, Rizki Taher Dwi Robertus Heri Sulistyo Roestamy, Martin Rohimat, Dadan Ronny Gusnadi, Ronny Rosyadi, Hanang Sabhariyah, Riesmiati Salbiah, Euis Seran, G. Goris seran, goris Seran, M.YGG Seta Satria Utama Shinta Dewi Rismawati Sirojuddin, Wawan Siti Nur Qomariah, Siti Nur Sudarno Sudarno Sugito Sugito Suherman, Fitria Aprilia Sukarelawati, Sukarelawati Suparti Suparti Susanti, Mey Syah, Hengky Firman Syaiful, Yuanita Tatik Widiharih Tri W., Vian Sigit Triana Sofiani Triastuti Wuryandari Ula, Fashihatul Utami, Irenda Putri Vica Nurani, Vica Wilis Ardiana Pradana, Wilis Ardiana Yuciana Wilandari Yunisa Ratna Resti, Yunisa Ratna Zahroh, Roihatul