Uncertain Statistics and COVID-19 Spread in China

2021 ◽  
pp. 2150008
Author(s):  
Waichon Lio
Keyword(s):  
Differential Equation ◽  
Regression Analysis ◽  
Uncertainty Theory ◽  
Hypothesis Test ◽  
Uncertain Differential Equation ◽  
Uncertainty Distribution ◽  
Times Series ◽  
Mathematical Techniques ◽  
Uncertain Statistics ◽  
Estimation Of Uncertainty

Uncertain statistics is a set of mathematical techniques for collecting, analyzing and interpreting data by uncertainty theory. In this paper, the main topics of uncertain statistics, including estimation of uncertainty distribution, uncertain regression analysis, uncertain times series, uncertain differential equation and uncertain hypothesis test, are reviewed. Furthermore, by the application to the COVID-19 spread in China, the advantages of those techniques in uncertain statistics are sorted out.

Pricing Convertible Bond in Uncertain Financial Market

2021 ◽  
pp. 2150007
Author(s):  
Zhiqiang Zhang ◽  
Zhenfang Wang ◽  
Xiaowei Chen
Keyword(s):  
Differential Equation ◽  
Financial Market ◽  
Stock Price ◽  
Uncertainty Theory ◽  
Convertible Bonds ◽  
Convertible Bond ◽  
Uncertain Differential Equation ◽  
Numerical Examples ◽  
Liu Process ◽  
Uncertain Calculus

This paper is devoted to evaluating the convertible bonds within the framework of uncertainty theory. Under the assumption that the underlying stock price follows an uncertain differential equation driven by Liu process, the price formulas of convertible bonds and the callable convertible bonds are derived by using the method of uncertain calculus. Finally, two numerical examples are discussed.

scholarly journals Structural Credit Risk Model with Jumps Based on Uncertainty Theory

2021 ◽  
Author(s):  
Hong Huang ◽  
Yufu Ning
Keyword(s):  
Differential Equation ◽  
Credit Risk ◽  
Behavioral Finance ◽  
Uncertainty Theory ◽  
Risk Model ◽  
Credit Default Swap ◽  
Uncertain Differential Equation ◽  
Underlying Asset ◽  
Stock Value ◽  
Proposed Model

Abstract Traditional finance studies of credit risk structured models are based on the assumption that the price of the underlying asset obeys a stochastic differential equation. However, according to behavioral finance, the price of the underlying asset is not entirely stochastic, and the credibility of financial investors also plays a very important role in asset prices. In this paper we introduce uncertainty theory to describe these credibility of investors and propose a new credit risk structured model with jumps based on the assumption that the underlying asset is described by an uncertain differential equation with jumps. The company default belief degree formula, zero coupon bond value and stock value formula are formulated. Company bond credit spread and credit default swap (CDS) pricing are studied as applications of the proposed model in uncertain markets.

The pth moment exponential stability of uncertain differential equation with jumps

2020 ◽  
Vol 39 (3) ◽  
pp. 4419-4425
Author(s):  
Shiqin Liu ◽  
Liying Liu ◽  
Na Wang ◽  
Jianguang Zhang
Keyword(s):  
Differential Equation ◽  
Exponential Stability ◽  
Uncertainty Theory ◽  
Axiom System ◽  
Uncertain Differential Equation ◽  
Necessary And Sufficient Condition ◽  
Pth Moment Exponential Stability ◽  
Definition Of ◽  
Necessary And Sufficient ◽  
Moment Exponential Stability

Under the axiom system of uncertainty theory, the paper mainly introduce the new definition of the pth moment exponential stability for uncertain differential equation with jumps. For illustrating the concept, some examples and counterexamples are given. Furthermore, we obtain a necessary and sufficient condition of stability in pth moment exponential for the linear uncertain differential equation with jumps. Also, the conclusion condition is illustrated very clearly by two examples.

scholarly journals Modeling RL Electrical Circuit by Multifactor Uncertain Differential Equation

Symmetry ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 2103
Author(s):  
Yang Liu ◽  
Lujun Zhou
Keyword(s):  
Differential Equation ◽  
Method Of Moments ◽  
Complex Structure ◽  
Internal Noise ◽  
External Noise ◽  
Electrical Circuit ◽  
Uncertain Differential Equation ◽  
Unknown Parameters ◽  
Uncertainty Distribution ◽  
Symmetry Principle

The symmetry principle of circuit system shows that we can equate a complex structure in the circuit network to a simple circuit. Hence, this paper only considers a simple series RL circuit and first presents an uncertain RL circuit model based on multifactor uncertain differential equation by considering the external noise and internal noise in an actual electrical circuit system. Then, the solution of uncertain RL circuit equation and the inverse uncertainty distribution of solution are derived. Some applications of solution for uncertain RL circuit equation are also investigated. Finally, the method of moments is used to estimate the unknown parameters in uncertain RL circuit equation.

PENGARUH KUALITAS PELAYANAN DAN WORD OF MOUTH TERHADAP KEPUTUSAN PEMBELIAN DI KAFE POTRET MEDAN

2019 ◽  
Vol 13 (2) ◽  
pp. 199
Author(s):  
Asrye Tutur Sinaga ◽  
Nurul Wardani
Keyword(s):  
Regression Analysis ◽  
Linear Regression ◽  
Service Quality ◽  
Word Of Mouth ◽  
Hypothesis Test ◽  
Linear Regression Analysis ◽  
Multiple Linear Regression Analysis ◽  
Quality Data ◽  
Purchasing Decisions ◽  
Study Hypothesis

AbstrakPenelitian ini bertujuan untuk mengetahui dan dapat menjelaskan pengaruh Kualitas Pelayanan dan Word Of Mouth terhadap Keputusan pembelian di Kafe Potret Medan. Populasi dalam penelitian ini adalah 700 orang ditentukan dari jumlah pengunjung Kafe Potret Medan dalam kurun waktu satu minggu, dan sampel yang digunakan berjumlah 88 pengunjung. Sedangkan tehnik pengumpulan data menggunakan angket (kuesioner) dan pengujiannya yaitu uji kualitas data dan uji asumsi klasik.Pengujian hipotesis menggunakan analisis regresi linier berganda, uji F, uji t, dan uji R2. Hipotesis penelitian dimensi Kualitas Pelayanan dan Word Of Mouth secara parsial terhadap Keputusan Pembelian diterima jika t hitung > t tabel dengan tingkat signifikan 0.05.Nilai t tabel dalam penelitian ini 1,662. Nilai t hitung variabel X1 sebesar 1,990 t hitung  > t tabel maka hipotesis diterima, nilai t hitung variabel X2 sebesar 2,628 t hitung > t tabel maka hipotesis diterima. Dari 2 variabel, variabel Word Of Mouth yang paling dominan mempengaruhi Keputusan Pembelian  sebesar 2,628. Kata Kunci : Kualitas Pelayanan, Word Of Mouth, Keputusan Pembelian AbstractThe purpose of this study is to identify and able to explain the influence of Service Quality and Word Of Mouth to Purchasing Decisions of Kafe Potret Medan. The population in this study were 700 people from visitors Kafe Potret Medan in one week, and the samples used were 88 visitors. While the techniques of data collection using the questionnaire and use the test of quality data and classical assumption. The hypothesis test uses multiple linear regression analysis, F test, R square and t test. The study hypothesis was partially of Service Quality and Word Of Mouth dimension to  Purchasing Decisions is acceptable if t hitung > t tabel with a significant level 0.05. The t tabel value in this study 1.662. The t hitung X1 is 1.990 that mean t hitung > t tabel then the hypothesis is accepted, t hitung X2 is 2.628 that mean t hitung > t tabel then the hypothesis is accepted. From 2 variables fascination that the most dominant variable for Purchasing Decisions is Word Of Mouth of 2.628. Keywords : Service Quality, Word Of Mouth, Purchasing Decisions

FRAUD CONFIRMATION, CLIENT SATISFACTION AND CLIENT LOYALTY

2019 ◽  
Vol 1 (1) ◽  
pp. 39
Author(s):  
Ngurah Pandji Mertha Agung Durya
Keyword(s):  
Regression Analysis ◽  
Linear Regression ◽  
Client Satisfaction ◽  
Audit Quality ◽  
Hypothesis Test ◽  
Linear Regression Analysis ◽  
Quality Attributes ◽  
Path Model ◽  
Coefficient Of Determination ◽  
The Government

<p>This study aims to find evidence, the influence of Audit Quality Attributes, Client Satisfaction and Client Loyalty, which are moderated by Fraud Confirmation. The research was conducted at the BKM, a community-based organization, formed by the Government, through the <em>Kotaku</em> Program. The research used Regression statistical analysis and conducted a hypothesis test. Regression analysis used includes Simple Linear Regression Analysis, Multiple Regression Analysis, and MRA Regression Analysis, and Path Model Linear Regression Analysis. This study also pays attention to the calculation of the coefficient of determination to give an idea of the ability of the model in explaining the phenomenon of Client Satisfaction and Client Loyalty. The result that both partially and simultaneously, Audit Quality Attributes, Fraud Confirmation affected Client Satisfaction and Loyalty. The research also succeeded in proving that Client Satisfaction mediates the effect of Audit Quality Attributes on Client Loyalty, but failed to provide empirical evidence, that the Fraud Confirmation moderated the effect of Audit Quality Attributes on Client Satisfaction and Loyalty. Contribution to audit practices, where it is important to realize Client Satisfaction through Audit Quality Attributes and Fraud Confirmation, especially in situations where Fraud acts are suspected.</p>

scholarly journals Pengaruh Kepemimpinan Dan Kompetensi Terhadap Produktivitas Pegawai PPSU (Studi Kasus Di Penanganan Prasarana Dan Sarana Umum Pada Kelurahan Lebak Bulus Jakarta Selatan)

2019 ◽  
Vol 2 (2) ◽  
pp. 189
Author(s):  
Rahmi Hermawati ◽  
Rizky Radhika Hidayat
Keyword(s):  
Regression Analysis ◽  
Sampling Method ◽  
Hypothesis Test ◽  
Test Validity ◽  
Collection Method ◽  
Urban Village ◽  
Sample Data ◽  
Leadership Competence ◽  
Multiple Analysis ◽  
Classical Regression

ABSTRACT As for the purpose of this study is to find and obtains evidence empirical and conclusions about influence style leadership and competence of the productivity employees infrastructure and facilities common (PPSU) in urban lebak bulus of south jakarta.            Research methodology used is associative with the quantitative approach. A method of the withdrawal of in the sample have used of these tests are the sampling method of saturated pt pgn promised to supply dating techniques in the entire household sample if all members of a percent of the population used as included in the research sample. Data collection method that we use is to a method of kuosioner and observation to the employees PPSU to officials in urban village lebak bulus of south jakarta . The method of analysis processing the data used was test validity, reabilitas test, test the assumption classical, regression analysis multiple, analysis koefisiensi determination ( r2 ), the hypothesis ( test f and t).            Based on the results of the analysis that has been done obtained that is the or relation a positive and welfare between style leadership and competence to productivity employees together or simultaneous is as much as r = 0,377, this showed that productivity employees at PPSU urban village lebak bulus south jakarta effected by force leadership and competence to a category strong contributing 37.7%, while or 62.3% influenced by other factors out variables tested in pengelitian this.The results of the regression equation is linear multiple namely y = 27,117 + 0,008X1 + 0,817X2 means if the force of leadership (X1) up 1 a unit of then will increase 0,008 and competence (X2) up 1 a unit of then will increase 0,817.Influence between leadership and competence to productivity employees is significant.This can be seen of the value of f count 25,972 > f table 3,10  Key Words : Leadership, Competence , Productivity

scholarly journals ANALYSIS OF COST OF SALES AND SALES ON NET INCOME

2021 ◽  
Vol 9 (1) ◽  
pp. 133
Author(s):  
Muchamad Pahmi Ramdhani
Keyword(s):  
Regression Analysis ◽  
Literature Review ◽  
Hypothesis Test ◽  
Linear Regression Analysis ◽  
Financial Statements ◽  
Multiple Linear Regression Analysis ◽  
Net Income ◽  
Test Analysis ◽  
Retail Trading ◽  
The Cost

This study aims to analyze The cost of sales and sales of net income in retail trading companies listed on the Bursa Efek Indonesia. The population and sample in this study are the financial statements of 12 retail trading companies listed on the Bursa Efek Indonesia for the period 2016-2018. This research technique uses classic assumption test, multiple linear regression analysis, hypothesis test and determination coefficient test. The collection technique uses the documentation and literature review methods. And after the data was collected, the test analysis in this study was carried out with the help of IBM SPSS 26 for Windows. Based on the results of the F test that The cost of sales and sold together has a simultaneous effect on net income in 12 retail trading sub-sector trading companies listed on the Bursa Efek Indonesia.

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