scholarly journals A Quantitative Validation Method of Kriging Metamodel for Injection Mechanism Based on Bayesian Statistical Inference

Metals ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 493 ◽  
Author(s):  
Dongdong You ◽  
Xiaocheng Shen ◽  
Yanghui Zhu ◽  
Jianxin Deng ◽  
Fenglei Li
Keyword(s):  
Normal Distribution ◽  
Hypothesis Test ◽  
Data Transformation ◽  
Kriging Model ◽  
Data Uncertainty ◽  
Small Range ◽  
Test Results ◽  
Kriging Metamodel ◽  
Injection Mechanism ◽  
Quantitative Validation

A Bayesian framework-based approach is proposed for the quantitative validation and calibration of the kriging metamodel established by simulation and experimental training samples of the injection mechanism in squeeze casting. The temperature data uncertainty and non-normal distribution are considered in the approach. The normality of the sample data is tested by the Anderson–Darling method. The test results show that the original difference data require transformation for Bayesian testing due to the non-normal distribution. The Box–Cox method is employed for the non-normal transformation. The hypothesis test results of the calibrated kriging model are more reliable after data transformation. The reliability of the kriging metamodel is quantitatively assessed by the calculated Bayes factor and confidence. The Bayesian factor and the confidence level results indicate that the kriging model demonstrates improved accuracy and is acceptable after data transformation. The influence of the threshold ε on both the non-normally and normally distributed data in the model is quantitatively evaluated. The threshold ε has a greater influence and higher sensitivity when applied to the normal data results, based on the rapid increase within a small range of the Bayes factors and confidence levels.

scholarly journals PENGARUH PENGGUNAAN MEDIA CD TUTORIAL TERHADAP HASIL BELAJAR MEMBATIK

2015 ◽  
pp. 239-248
Author(s):  
Dina Ampera ◽  
Naomi Juliarti
Keyword(s):  
Normal Distribution ◽  
Learning Outcomes ◽  
Hypothesis Test ◽  
Learning Objective ◽  
Test Results ◽  
Significance Level ◽  
Normality Test ◽  
Step Procedure ◽  
The Media ◽  
Academic Year

Abstrak:Membatik memerlukan tata cara pembuatan yang bertahap. Akan lebih baik jika tahap-tahap tersebut dijelaskan melalui materi audio-visual sehingga lebih mudah dimengerti oleh siswa. Penelitian ini bertujuan untuk mengetahui pengaruh penggunaan Media CD Tutorial terhadap hasil belajar membatik siswa SMK Negeri I Berastagi dan seberapa efektifkah penggunaan CD Tutorial tersebut terhadap peningkatan hasil belajar siswa dalam membatik. Penelitian ini dilaksanakan pada semester genap Tahun Ajaran 2013/2014, dengan metode quasi eksperimen. Hasil penelitian menunjukkan bahwa hasil belajar membatik Kelas Eksperimen cenderung cukup (83%), dan hasil belajar membatik Kelas Kontrol juga cenderung cukup (80%). Uji normalitas data pada taraf signifikan 5% dengan dk = 35, diperoleh data hasil belajar membatik Kelas Eksperimen berdistribusi nomal, Lh<Lt(0,0890<0,1610) dan Kelas Kontrol berdistribusi normal, Lh<Lt(0,0911<0,1610). Uji homogenitas, diperoleh Fh<Ft yaitu 1,53 < 1,89 sehingga kedua kelas penelitian memiliki varians sama (homogen). Hal ini membuktikan bahwa terdapat keselarasan antara data hasil penelitian Kelas Eksperimen dengan Kelas Kontrol. Hasil uji hipotesis dengan uji-t diperoleh nilai Sg sebesar 1,28, nilai th sebesar 6,74, sedangkan nilai tt pada taraf signifikansi 5% dengan n = 60 sebesar 1,679. Dengan demikian, th>tt (6,74>1,679). Disimpulkan bahwa terdapat pengaruh yang signifikan atas penggunaan Media CD Tutorial terhadap hasil belajar membatik. Selain itu, penggunaan CD tutorial menimbulkan kegairahan dan motivasi dalam belajar, yang bermuara pada pencapaian tujuan pembelajaran.Kata Kunci: Membatik, media CD tutorial, tujuan pembelajaranAbstract:Making batik requires step by step procedure. It is better to explain the steps in audio-visual material so that the students can understand them better. This study aims to find out the effect of Media CD Tutorial usage towards batik learning outcomes of SMKN 1 Berastagi students and its effectiveness in improving the students batik learning outcomes. This research was carried out in the second semester of 2013/2014 academic year, with quasiexperimental methods. The result shows that the Experimental Class’ batik learning outcomes tends to be fair (83%), and the Control Class’ batik learning outcomes also tends to be fair (80%). Normality test data on a significant level of 5% with df = 35 results in normal distribution of Experimental Class’ batik learning outcomes, Lh <Lt (0.0890 <0.1610) and normal distribution of Control Class too, Lh <Lt (0.0911 <0, 1610). Homogenity test results in Fh <Ft namely 1.53 <1.89, so both classes have the same variance (homogeneous). This proves that there is harmony between the data of Experimental Class resulted from the research and those of Control Class. Hypothesis test by using t-est results in Sg value of 1.28, the th value of 6.74, whereas tt value at significance level of 5% with n = 60 is 1,679. Thus Th>Tt (6.74> 1.679). It was concluded that there is a significant effect from the Media CD Tutorial usage towards batik learning outcomes. Besides, Media CD Tutorial usage creates passion and motivation of the students to learn, which, in turn, results in the learning objective achievement.Keywords: Making batik, media CD tutorial, learning objective

Problematic Internet Use digunakan Ketika Kesepian pada Remaja

2020 ◽  
Vol 14 (1) ◽  
pp. 45-60
Author(s):  
Yashinta Yashinta ◽  
Dwi Hurriyati
Keyword(s):  
Internet Use ◽  
Hypothesis Test ◽  
Problematic Internet Use ◽  
Coefficient Of Determination ◽  
Test Results ◽  
Research Subjects ◽  
Significance Level ◽  
Relationship Of ◽  
The Relationship ◽  
Effective Contribution

This study aims to determine the relationship of loneliness with problematic internet use on boarding students on Silaberanti street in Siantan jaya Opposite Ulu 1 Palembang city. Research subjects numbered 220 people using random sampling methods. Data was collected using a 60 item problematic internet use scale and a 60 item loneliness. Realibility is generated on scale of problematic internet use of 0,955 and loneliness of 0,946.Hypothesis testing uses product moment correlation analysis techniques. Hypothesis test results showed a positive relationshif between loneliness with problematic internet use on boarding students on Silaberanti street in Siantan jaya Opposite Ulu 1 Palembang city r= 0,684 with a significance level of 0,000 (p<0,01). Loneliness in this study made an effective contribution of 46,8% to problematic internet use which can be seen from the coefficient of determination (r²) that is equel to 0,468.

Kemampuan Komunikasi Matematika: Studi Komparasi Pembelajaran Number Head Together (NHT) dan Media Power Point (PPT)

2020 ◽  
Vol 3 (1) ◽  
pp. 39-50
Author(s):  
Bernadeta Ritawati ◽  
Sri Wahyuni
Keyword(s):  
Communication Skills ◽  
Hypothesis Test ◽  
Test Results ◽  
Mathematical Communication ◽  
Cluster Technique ◽  
Significance Level ◽  
Quasi Experimental ◽  
Power Point ◽  
Media Power ◽  
Better Than

This research is a quasi-experimental study that aims to determine the comparison of students' mathematical communication abilities with the cooperative learning model of the NHT and PPT media in class VII SMP Negeri 02 Ngabang. The population in this study were all students of class VII SMP 02 Ngabang consisting of 3 classes. The sample in this study was taken by using the Random Sampling Cluster technique. Class VII A as class I experimental class with 24 students and class VII B as a experimental class II with 24 students. The instruments used were pretest and posttest in the form of description. Data analysis uses the t test with a significance level of 5%. The results showed the average posttest for the NHT class was 72.5 and the average posttest for the PP class was 66.666. From the posttest hypothesis test results obtained t hitung> t tabel (1.9522> 1,667). Because t_hitung> t_tabel, H_0 is rejected and H_a is accepted. This means that students' mathematical communication skills taught with the NHT are better than using Power point media.

The Influence of Understanding Accounting Information Systems, Leadership Style, Employee Motivation, and Work Discipline in Employees Performance KC BRI Sidoarjo

Academia Open ◽  
2021 ◽  
Vol 5 ◽  
Author(s):  
Shafrino Wahyu ◽  
Herman Ernandi
Keyword(s):  
Information Systems ◽  
Leadership Style ◽  
Hypothesis Test ◽  
Accounting Information ◽  
Research Data ◽  
Reliability Test ◽  
Test Results ◽  
Accounting Information Systems ◽  
Validity Test ◽  
Systems Leadership

This research aims to know the influence of understanding Accounting Information Systems, Leadership Style, Employees Motivation, and Work Discipline in Employees Performance at KC BRI Sidoarjo. The instrument is in the form of google forms to get research data. This research data collection is validity test and reliability test. The hypothesis is that there is an the influence of understanding accounting information systems, leadership style, employees motivation, and work discipline in employees performance. The analytical tool used to test the hypothesis is SPSS version 18. The test results based on the validity test show that all questions on Google Forms are declared valid. While the test results based on the reliability test of all variables, the value of cronbach's alpha > 0,6 means that it is declared reliable and for the results of the Hypothesis Test in the form of T-Statistic and R-Square, it states that there is an influence between understanding accounting information systems, leadership style, employees motivation, and work discipline in employees performance. This is shown from the results of tcount for the variable understanding of the accounting information system (X1) of 2.113, the variable of leadership style (X2) of 2.101, the variable of employees motivation (X3) of 2.114, and the variable of work discipline (X4) of 2.189.

scholarly journals PENGARUH KINERJA KEUANGAN TERHADAP PERTUMBUHAN LABA PADA PT. SEMEN TONASA (Persero) DI KABUPATEN PANGKEP

2019 ◽  
Vol 15 (2) ◽  
pp. 52-68
Author(s):  
Muhamad Ali Wairooy
Keyword(s):  
Financial Performance ◽  
Hypothesis Test ◽  
Linear Regression Analysis ◽  
Secondary Data ◽  
Coefficient Of Determination ◽  
Test Results ◽  
Simple Linear Regression ◽  
Earnings Growth ◽  
Saturated Sample ◽  
Profit Growth

This study aims to test and analyze the effect of financial performance on profit growth at PT. Semen Tonasa (Persero) in Pangkep Regency. Data collection using secondary data using samples in this study is a saturated sample (census). The population in this study is the number of years of financial performance (ROA) and the number of years of profit growth at PT. Semen Tonasa (Persero) in Pangkep Regency, which is 36 months from 2015 - 2017, while the sample taken is the number of observations for 36 months (January 2015-December 2017). The data obtained were analyzed using simple linear regression analysis, t test and test coefficient of determination (R²) which processing was carried out with SPSS version 23. The results showed that the proposed hypothesis was accepted because it showed positive and significant hypothesis test results. This means that financial performance has a positive and significant effect on earnings growth.

scholarly journals EFEKTIVITAS PENDEKATAN SCIENCE ENVIRONMENT TECHNOLOGY AND SOCIETY BERBASIS CTL TERHADAP HASIL BELAJAR

2021 ◽  
Vol 2 (1) ◽  
pp. 140-148
Author(s):  
Arif Rahman Hakim ◽  
Muhammad Sururuddin ◽  
Nur Haqiqi
Keyword(s):  
Learning Outcomes ◽  
Science Learning ◽  
Hypothesis Test ◽  
Test Results ◽  
Technology And Society ◽  
Validity And Reliability ◽  
Chi Square ◽  
Normality Test ◽  
Before And After ◽  
Post Test

This study aims to determine the effectivenes of the CTL based SETS approach to student science learning outcomes in fourth grade. This type of research used in this study is an experimental research design using one group pretest-posttes. The sample used was 27 peoples who were grade IV. Data collection techniques using observation and test descriptions to determine student learning outcomes that are assessed using an assessment rubric. Before the data were analyzed, the instrument was tested for validity and reliability. After the research was carried out and the data collected, the pre-test and post-test results were analyzed. The pretest result reached an average of 64.98 into the sufficient category. Then at the posttest the average overall score is 71.28 in the good category. For the requirement test, data analysis was carried out by using the chi-square normality test, while the hypothesis testing technique used the t-test. Hypothesis test results obtained tcount>ttable. It means the conclution that there are differences in student science learning outcomes before and after the Science, Environment, Technology, And Society approaches are used based on CTL in grade IV SDN 6 Masbagik Selatan in the 2020/2021 academic year.

scholarly journals MOTIVASI BERPRESTASI DENGAN ADVERSITY QUOTIENT PADA SISWA MADRASAH ALIYAH DI KOTA PALEMBANG

2019 ◽  
Vol 5 (1) ◽  
pp. 74-82
Author(s):  
Rima Melati Farisuci ◽  
Budiman Budiman ◽  
Lukmawati Lukmawati
Keyword(s):  
High School ◽  
Data Analysis ◽  
Achievement Motivation ◽  
Quantitative Research ◽  
Hypothesis Test ◽  
Senior High School ◽  
Test Results ◽  
Spearman Rank ◽  
Analysis Methods ◽  
Data Analysis Methods

This research aims to know thecorrelation between Achievement Motivation with Adversity Quotient for Students at Senior High School Palembang and used the correlational quantitative research. The hypothesis proposed in this research is there is a correlation between Achievement Motivation with Adversity Quotient for Students at Senior High School Palembang. The research sample are 68 people consisting of 3 classes with ages ranging from 16-18 years. Data Analysis methods use the spearman rank technique and SPSS Version 23 for windows. Hypothesis test results show a significance value of 0,037  where is p<0.05, it means there is correlation between Achievement Motivation with Adversity Quotient for Students at Senior High School Palembang. Other word that one of the factors that can influence adversity quotient is achievement motivation.

scholarly journals Are sovereign ratings by CRAs consistent?

2018 ◽  
Vol 65 (1) ◽  
pp. 95-115
Author(s):  
Hami Saka ◽  
Mehmet Orhan
Keyword(s):  
Historical Data ◽  
Hypothesis Test ◽  
Emerging Market ◽  
Credit Ratings ◽  
Test Results ◽  
Emerging Market Countries ◽  
Compare And Contrast

This study is an attempt to compare and contrast the credit ratings granted by prominent agencies, the so-called Big Three namely S&P, Moody?s and Fitch, that dominate the market. The sovereign ratings are proven to motivate the CDS figures of countries empirically, and low ratings are known to increase the interest paid to liabilities by these countries. We employ the historical data over 1994-2014 on the sovereign ratings of 117 countries to test for whether the ratings assigned by CRAs are significantly different or not, with the help of paired-t and ANOVA tests. Hypothesis test results reveal that such differences are significant for many countries and country groups, suggesting that the ratings by CRAs are not consistent with each other. This is true for BRIC, OECD, and emerging market countries. Extra ANOVA tests that we conducted support our findings.

scholarly journals Milenial Intention on Social Media

2020 ◽  
Vol 2 (1) ◽  
pp. 70-82
Author(s):  
Selfia Ratna Kasih ◽  
Asep M Ramdan ◽  
Acep Samsudin
Keyword(s):  
Social Media ◽  
Significant Influence ◽  
Research Method ◽  
Quantitative Research ◽  
Hypothesis Test ◽  
Consumer Confidence ◽  
Consumer Trust ◽  
Test Results ◽  
Analysis Technique ◽  
Mediation Hypothesis

The purpose of this study is to measure how much influence social media Instagram and consumer confidence in millennial purchase interest. The variables of this research are Instagram social media (X1), consumer trust (X2) and millennial purchase interest (Y). The method used in this study is a quantitative research method with an associative approach, by distributing 200 online questionnaires to millennials of productive age. The analysis technique used to test the hypothesis in this study is the path analysis. Hypothesis test results show intagram social media and consumer trust have a significant influence on millennial buying interest and mediation hypothesis testing results show that consumer confidence variables mediate Instagram social media on millennial buying interest. Conclusion, consumer confidence in an online fashion store will certainly affect the buying interest. Keywords: Instagram, Consumer Trust, Social Media, Millennials, Purchase Interest

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