Budi Lestari
Department of Mathematics, Faculty of Mathematics and Natural Sciences, University of Jember

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MATRIKS KOVARIANSI DALAM REGRESI NONPARAMETRIK MULTIRESPON PADA KASUS KORELASI SAMA DAN KORELASI TIDAK SAMA Lestari, Budi; Budiantara, I Nyoman; Sunaryo, Sony; Mashuri, Muhammad
Jurnal Ilmiah Matematika dan Pendidikan Matematika Vol 4 No 1 (2012): Jurnal Ilmiah Matematika dan Pendidikan Matematika
Publisher : Jurusan Matematika FMIPA Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jmp.2012.4.1.2950

Abstract

In the real cases, we are frequently faced the problem in which two or more dependent variables are observed at several values of the independent variables, such as at multiple time points. Multi-response nonparametric regression model, especially smoothing spline model, provides powerful tools to model the function which represents association of among the variables. The problem is how to estimate nonparametric regression curve of the multi-response nonparametric regression model. The nonparametric regression curve can be estimated using spline estimator approach, that is by carrying out penalized weighted least-squares optimation. Therefore, we need a covariance matrix which will be used as a weight of the optimation. In this paper, we determine the construction of covariance matrix for both equal and unequal of correlations cases. The results show that the covariance matrices have quite similar construction of diagonal elements but the elements outside the diagonal have very different construction that depend on the construction of the Jordan matrix.
Analisis SEM (Structural Equation Model) Dalam Manajemen Industri Layanan Kesehatan Menggunakan LISREL dan OSS Statistika-R Habibi, Azwar; Tirta, I Made; Lestari, Budi
JURNAL BIOSHELL Vol 3 No 1 (2014): BIOSHELL
Publisher : Pendidikan Biologi,Universitas Islam Jember

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Abstract

The objective of this research is to know the application of SEM (Structural Equation Model) analysis in seeing reliability and validity of causal relationship among latent variables  in the area of marketing management of health service industry influenced by patient perception about health service quality on patient loyality with satisfaction of patient as the medium variable. SEM Analysis is a group of statistical techniques which is conducive to be done examination a relation network which is complicated relative simultaneously. In SEM, we can do three activities simultaneously, that are  inspection and validity of reliability equivalent instrument with confirmatory factor analysis, examination of relationship model among latent variables equivalent with path analysis, and get worthwhile model for predicting equivalent with structural model or regression  analysis. The conclusion of got from this research is there are influence which significant among the perception of patient to the patient loyality, the perception of patient to the satisfaction of patient, the satisfaction of patient to the  patient loyality.Keywords: Structural Equation Model, reliability, validity, confirmatory factor analysis, path analysis.
Peningkatan Kemampuan Mengerjakan Soal Ceritas Siswa Kelas III Sekolah Dasar Melalui Penggunaan Media Komik Edukatif di SDN Lubang Buaya 12 Pagi Lestari, Budi
Statement | Jurnal Media Informasi Sosial dan Pendidikan Vol. 2 No. 1 (2012): Statement | Jurnal Media Informasi Sosial dan Pendidikan
Publisher : Pengurus Pusat Perkumpulan Masyarakat Peduli Pendidikan

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Abstract

Matematika diharapkan dapat melatih siswa untuk memahami suatu masalah dan menentukan strategi pemecahan masalah sehari-hari. Namun, pada kenyataannya guru-guru mengeluhkan seringnya siswa-siswa mengalami kesulitan dalam mengerjakan soal matematika, terutama saat menghadapi soal cerita. (National Council Of Teacher of Mathematics, 1990:17). Hasil penelitian Priatna (1994) mengungkapkan bahwa kemampuan siswa kelas IV SD dalam menyelesaikan soal cerita dan mengambil langkah-langkah penyelesaian masih rendah, yaitu 50,26%. (Suwarjana, 1998:112). Penggunaan media komik dalam pelajaran matematika dapat membuat pembelajaran lebih menarik dan melatih siswa untuk berpikir sistematis. Hal ini berkaitan dengan sifat komik yang sederhana, jelas, mudah dipahami, dan lebih personal (Rohani, 1997:21). Berdasarkan pertimbangan peneliti, banyak hal yang dapat diteliti dalam peningkatan kernampuan mengerjakan soal cerita siswa kelas III sekolah dasar. Peneliti membatasi penelitian ini pada peningkatan kemampuan mengerjakan soal cerita siswa kelas III sekolah dasar menggunakan media komik edukatif.
Semiparametric Modeling of Consumer Price Index Lestari, Budi
Majalah Ilmiah Matematika dan Statistika Vol 16 No 2 (2016): Majalah Ilmiah Matematika dan Statistika
Publisher : Jurusan Matematika FMIPA Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/mims.v16i2.23743

Abstract

Many classical data, for example, exchange rate, stock price, and consumer price index (CPI) data cannot be analyzed under independent observation assumption. In addition, some time series data cannot be modeled well into a fully linear model, for instance, CPI, price of raw materials for some certain industries and price of some industrial products data in which monetary crisis of Indonesia in 1998 has caused a dramatic effect on the time series of CPI, price of raw materials and industrial products. A semiparametric model is a mixture model between parametric and nonparametric models. If we apply it to time series data, we will obtain a semiparametric time series model known as partly linear autoregressive model: y1= β yt-1 + g ( yt-2 ,..., yt-p ) + εt for t > p + 1. Here β is an unknown parameter to be estimated, g(.) is an unknown function in Rp-1 , εt are i.i.d. random errors with E ( ε1 ) = 0 and E ( ε12 ) < ∞, and εt are independent of ys for all s = 1 , 2 ,..., p and t > p + 1 . Based on the model above, we investigate a model for general consumer price index (GCPI) of Jember data recorded monthly from January 1998 to December 2002 by Statistic Center Bureau of Jember.
EFFECTIVENESS OF SUBSTANTIVE TECHNICAL EDUCATION AND TRAINING FOR ISLAMIC SENIOR HIGH SCHOOL BIOLOGY TEACHERS Saputro, Budiyono; Lestari, Budi; Widiyanti, Fenny; Saputra, Heru
Unnes Science Education Journal Vol 8 No 2 (2019): July 2019
Publisher : Department of Integrated Science, Faculty of Mathematics and Natural Sciences, Universitas Negeri Semarang in Collaboration with Perkumpulan Pendidikan IPA Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/usej.v8i2.33897

Abstract

The purpose of this study was to determine the effectiveness of substantive technical education and training program for Islamic High School (Madrasah Aliyah/MA) throughout Central Java and Yogyakarta. Quantitative research with "One-Group Pretest-Postest Design" research design was used. Population and samples were taken from all Biology teachers throughout Central Java and Yogyakarta with a total of 33 participants. Instruments for data retrieval were questions about pretest and posttest. The data were in the form of participants’ pretest and posttest results. Based on the Wilcoxon test results, it obtained t count -3.083, while p = 0.002 <0.05, it could be concluded that substantive education and training can effectively improve the material mastery for Madrasah Aliyah biology teachers. The materials were the analysis of Graduate Competence Standard (SKL), Core Competence (KI), Basic Competence (KD), Biology Indicators of Madrasah Aliyah, essential material of anatomy and physiology of animals and plants, cells, animal and plant tissues, metabolic processes, biotechnology and their application, genetic in inheritance, and the practice of Madrasah aliyah biology learning.