This study aims to describe students' mathematical problem-solving abilities based on mathematical dispositions at Riyadlul Mukhlishien Middle School. This type of research used in this research is descriptive qualitative. The research subjects used were 21 students of class VIII A. The data sources of this research are in the form of questionnaires, test descriptions and interviews. The results of the questionnaire were used to classify the level of students' mathematical dispositions. After that, two students from each category of mathematical disposition were selected to be the subject of tests and interviews. The results of tests and interviews of mathematical problem-solving abilities were analyzed based on the mathematical disposition of the students. The results of this study indicate that the mathematical disposition of SMP Riyadlul Mukhlishien students is divided into three categories, high, medium and low. Students who have mathematical problem-solving abilities in the high mathematical disposition category are able to meet the indicators of mathematical problem-solving abilities well and write them down completely. Students who have mathematical problem-solving abilities in the moderate mathematical disposition category are able to meet the indicators of mathematical problem-solving abilities but do not write them down completely. Students who have mathematical problem-solving abilities in the low mathematical disposition category are less able to meet the indicators of mathematical problem-solving abilities because they do not write them down completely and still experience errors in calculations
ABSTRAKKemampuan dalam bidang matematika dapat mengindikasi kemajuan suatu bangsa. Salah satu kemampuan dalam matematika adalah kemampuan penalaran adapatif. Tujuan penelitian ini adalah untuk mengetahui pengaruh metode pembelajaran discovery learning terhadap kemampuan penalaran adaptif siswa SMA. Penelitian ini dilakukan di SMA Tahun Ajaran 2016/2017. Metode penelitian yang digunakan adalah metode quasi eksperimen dengan desain Nonequivalent Control Group Design, yang melibatkan 65 siswa sebagai sampel. Pengumpulan data dilakukan menggunakan pretest dan postest. Hasil penelitian menunjukkan bahwa metode pembelajaran discovery learning berpengaruh terhadap kemampuan penalaran adaptif siswa. Hal ini dapat dilihat uji t postest t hitung > t tabel (2,533 > 1,99). Serta peningkatan kemampuan penalaran adaptif siswa melalui metode pembelajaran discovery learning lebih baik dari pada menggunakan metode pembelajaran konvensional melalui perhitungan N-Gain Skor.
Tulisan ini mengkaji hubungan antara rasio keuangan terhadap persentase keuntungan pada perusahaan-perusahaan yang tercatat di Bursa Efek Indonesia (BEI) berdasarkan data Indonesian Capital Market Directory (ICMD) tahun 2010. Rasio keuangan yang dilibatkan dalam dalam penelitain ini antara lain Price Earning Ratio (PER), Price to Book Value (PBV), Current Ratio (CR), Debt to Equity (DE),Laverage Ratio (LR), Gross Profit Margin (GPM), Operating Profit Margin (OPM), Net Profit Margin (NPM), Inventory Trun Over (ITO), Total Aset Turn Over (TAT), dan Return on Investment (ROI). Perusahaan-Perusahaan Manufaktur yang dijadikan sampel dalam peneltian ini antara lain: PT Ultrajaya Milk Industry & Trading Company Tbk, PT Tunas Baru lampung Tbk, PT Siantar Top Tbk, PT Sinar Mas Argo Resources and Technology Tbk, PT Sekar Laut Tbk, PT Pioneerindo Gourmet International Tbk, PT Prasidha Aneka Niaga TBk, PT Mayora Indah Tbk, PT Aqua Golden Missisipi Tbk, PT Cahaya Kalbar Tbk. Hubungan antara rasio keuangan terhadap persentase keuntungan pada perusahaan manufaktur dalam penelitian in berupa model regresi linear berganda yang dipengaruhi oleh rasio keuangan berupa PER, LR, GPM, ITO dan ROI dengan keakuratan model sebesar 60.8 persen. Kata Kunci: Perusahaan Manufaktur, Persentase Keuntungan, Rasio Keuangan, Model Regresi
This research showing comparison accuration regression model using Gauss LU Decomposition and Backward Method. Regression model in this research is a model that explaining influence finance ratios against profit percentage in manufacture companies noted in Indonesia Stock Exchange (IDX) year 2010. The regression model is an output of Gauss LU Decomposition using SPSS and Backward method. Furthermore in this research coefficient that compile regression model is comparing between of Gauss LU Decomposition and Backward method. The result showing that coefficient of Backward Method has some errors than coefficient of Gauss LU Decomposition, but the value of nine coefficient error not bigger that 10 percent and still can be accepted. In this research also delivered accuracy of accounting profit some manufacture companies using the two of that method.
AbstrakPenelitian teoritis ini mengkaji mengenai metode numerik Stepest Descent yang terinduksi Newton. Penelitian ini dilakukan dengan cara memahami terlebih dahulu mengenai metode numerik Stepest Descent dan Newton, kemudian mengkonstruksi metode baru yang disebut dengan Stepest Descent terinduksi Newton. Pada makalah ini turut disertakan pula contoh perhitungan numerik antara ketiga metode tersebut beserta analisis perhitungannya. AbstractThis research is investigating numerical method of Steepest Descent inducted of Newton. Steps of this research can be described as follows: First, the author has to understand the definition and algorithm of Steepest Descent and Newton methods. After that, the second, author constructing the new method called by Steepest Descent inducted newton. In this paper, author also containing examples of numerical counting among that three methods and analyze them self.
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