Whitmore, Marjorie Lee Threet

Differential item functioning (DIF) detection rates were examined for the logistic regression and analysis of variance (ANOVA) DIF detection methods. The methods were applied to simulated data sets of varying test length (20, 40, and 60 items) and sample size (200, 400, and 600 examinees) for both equal and unequal underlying ability between groups as well as for both fixed and varying item discrimination parameters. Each test contained 5% uniform DIF items, 5% non-uniform DIF items, and 5% comb...

Sahlin, Tobias

Lured by the promise of bigger sales, companies are increasingly looking to raise the volume of international trade. Consequently, the amount of bulk products carried in containers and transported overseas exploded because of the flexibility and reliability of this type of transportation. However, minimizing the logistics costs arising from the container flow management across different terminals has emerged asa major problem that companies and affiliated third-party logistics firms face routine...

Ya-Fang Kao, 高雅芳

碩士 / 國立中正大學 / 數理統計研究所 / 91 / This paper describes a computational procedure for obtaining maximum likelihood estimators (MLE) of parameters in generalized linear models. The maximum likelihood estimators (MLE) are compared with the corresponding least square estimators (LSE) in regard to their performance in accuracy of estimation. The study covers binary regression, logistic regression, and mixture-binomial linear model. Computer simulations are undertaken extensively to accomplish the comparis...

Hui-Min Chen, 陳慧敏

碩士 / 中原大學 / 數學研究所 / 89 / Abstract Mixtures of distributions are used to analyze the grouped categorical data. The estimation of parameters is an important step for mixture distributions. According to Yang and Yu (1999), they described maximum likelihood estimation (MLE) algorithm, expection maximization (EM) algorithm, classification maximum likelihood (CML) algorithm and fuzzy classification maximum likelihood (FCML) algorithm to estimate the parameters of a mixture of multivariate Bernoulli di...

Emfevid, Lovisa, Nyquist, Hampus

As automation in the financial service industry continues to advance, online investment advice has emerged as an exciting new field. Vital to the accuracy of such service is the determination of the individual investors’ ability to bear financial risk. To do so, the statistical method of logistic regression is used. The aim of this thesis is to identify factors which are significant in determining a financial risk profile of a retail investor. In other words, the study seeks to map out the relat...

abstract: When analyzing longitudinal data it is essential to account both for the correlation inherent from the repeated measures of the responses as well as the correlation realized on account of the feedback created between the responses at a particular time and the predictors at other times. A generalized method of moments (GMM) for estimating the coefficients in longitudinal data is presented. The appropriate and valid estimating equations associated with the time-dependent covariates are i...

Lindroth Henriksson, Amelia, Koller, Simon

This thesis was conducted to investigate what factors impact the outcome of a patent application for the Swedish market. The method used was logistic regression and the data was extracted from the database of The Swedish Patent and Registration Office, PRV. The analysis in this thesis started with 47 covariates, including the 35 IPO technical fields, resulting in a model consisting of five covariates. The most important covariates were determined to be the number of notices issued by PRV, whethe...

Verma, Arun Kumar

PURPOSE Thrombocytopenia, which is common in critically ill patients, can increase bleeding risk or be a clinical sign of heparin-induced thrombocytopenia (HIT). This investigation: 1) estimated the incidence of, identified explanatory variables at and after admission, and evaluated the performance of predictive models for thrombocytopenia, and 2) estimated the incidence of HIT, and evaluated the predictive performance of a heparin-PF4 enzyme-linked immunosorbent assay (ELISA) for diagnosi...

Park, Minjeong

This thesis focuses on an investigation of differential functioning in all options of multiple-choice items, referred to as differential options functioning (DOF). That is, DOF investigates whether respondents from different groups (i.e., subpopulations), with equal levels of attribute being measured, would have different probabilities to select the options. In previous research, DOF has been typically conducted as a secondary analysis for DIF of items in achievement/aptitude tests. This thesis ...

Alkhalaf, Arwa A.

What happens to the parameter estimates and test operating characteristics when the predictor variables in a logistic regression are skewed? The statistics literature provides relatively few answers to this question. A series of simulation studies are reported that investigated the impact of a skewed predictor (s) on the Type I error rate and power of the Wald test in a logistic regression model. Five simulations were conducted for three different models: a simple logistic regression with a bina...

Gesicki, Adam

Logistic Regression (LR) has been a technique used for the detection of items exhibiting differential item functioning (DIF). When it was introduced in 1990, the LR was conceptualized as strictly a test of statistical significance. This led to the over-identification of items as DIF, generally not exhibiting practically (psychometrically) significant differences. The use of blended decision rules – where effect sizes are used in addition to statistical significance in the decision-making process...

Lecuyer, Jean-Francois

The number of drivers aged 65 years and older in Canada and the proportion of the population these drivers represent have been increasing for many years and will continue to do so in years to come. This increase in the number of elderly drivers could possibly lead to an increase in the numbers of fatalities, serious injuries and collisions involving drivers of this age group[1]. In order to find ways to reduce the number of collisions involving elderly drivers, and in particular the number of fa...

Yamben, Jean-Yves

The aim of this thesis is to provide to the governmental decision-maker/user, an instrument that can assist him/her in improving the infrastructure investment decision in the economical, environmental and sustainable aspects. This means that, the Return on Investment (ROI) of the concerned transport infrastructure, satisfying environmental and sustainable constraints must be positive, and corresponding to an optimal investment cost. The decision support system can be applied in two dimensions. O...

Larsson, Hanna, Tica, Selma

The goal of this study was to find factors affecting the pickers’ productivity negatively, in the order picking process, and to suggest a change that can increase the pickers’ productivity. By a qualitative approach the initial situation at PostNord was studied. The obtained results, after analyzing the initial situation, showed various factors that affect the pickers’ productivity negatively. All these contributed to waste, meaning that the picker did not use its time correctly according to Lea...

Bomberová, Gabriela

The Hungarian company Cool Tej (one of the companies that belong to British Cool Milk Group) performs losses on distributing milk to schools in one particular part of Hungary. Therefore, the milk distribution in Hungary is the issue that was further analysed and for which various solutions were found and evaluated.

Miller, Stephanie R.

Urban Education / Ph.D. / Despite the multiple and diverse types of school reform to influence instruction, curriculum and fiscal policies, many urban students have low educational success and attainment. A fundamental problem of school reform is that it fails to address the economic, social, physical and cultural challenges that plague urban communities, families and children. Many urban neighborhoods are plagued by violence, crime, homelessness, property damage, poverty and other ruinous and d...

Holm, Stephanie, Stegare, Sara

This thesis was conducted to investigate what factors are important for a financial institute when predicting the risk of default for a Swedish mortgage portfolio. The applied method was logistic regression analysis and the data used in the thesis was received from a Swedish financial institute. Many of the conducted studies assessing the risk of default only considers five to ten covariates. This thesis started by 29 covariates, ending up in a final model with 16 covariates included. The most i...

Wiklund Froby, Sofie

No description available.

Eldud Omer, Ahmed Abdelkarim

The secondary structure of proteins is predicted using various binary classifiers. The data are adopted from the RS126 database. The original data consists of protein primary and secondary structure sequences. The original data is encoded using alphabetic letters. These data are encoded into unary vectors comprising ones and zeros only. Different binary classifiers, namely the naive Bayes, logistic regression and classification trees using hold-out and 5-fold cross validation are trained using t...

Lane, Ginny G.

In this study I analyzed the 1089 desegregation outcomes in federal district courts that occurred between 1994 and 2004 in order to identify a) the legal and non-legal factors in the litigation process that predict pro-desegregation outcomes and b) the judicial patterns that impact the future of desegregation policy. Twenty-one legal and non-legal variables were analyzed via logistic regression analysis to identify factors that predict pro-desegregation outcomes. Only three predictor variables...

Rambo, James R.

The purpose of this study was to investigate predicting student success on one example of a "high stakes" test, the Texas Assessment of Academic Skills Exit Level Exam. Prediction algorithms for the mathematics, reading, and writing portions of the test were formulated using SPSS® statistical software. Student data available on all 440 students were input to logistic regression to build the algorithms. Approximately 80% of the students' results were predicted correctly by each algorithm. The dat...

Shih-Hui Yang, 楊士慧

碩士 / 國立臺灣大學 / 資訊管理學研究所 / 99 / With advance of Web 2.0 technology, many social networks such as Facebook, Twitter, and Digg, have been highly developed in recent years. Understanding the growth patterns and the characteristics of social networks helps us to promote the technology of running social networks, increase the networks’ value, and formulate marketing and pricing strategies. Therefore, in this thesis, we first utilize the concept of internal and external attractions to propose a populati...

Irvine, Paul Michael

Many organisms, especially animals like insects, which depend on the environment for body heat, have growth stages and life cycles that are highly dependent on temperature. To better understand and model how insect life history events progress, for example in the emergence and initial growth of the biogeographical research subjects, we must first understand he relationship between temperature, heat accumulation, and subsequent development. The measure of the integration of heat over time, usuall...

MacNeill, Stephanie Jan

No description available.

Doig, Gordon S.

No description available.

Stevenson, Clint Wesley,

Project (M.S.)--Brigham Young University. Dept. of Statistics, 2006. / Includes bibliographical references (p. 66-67).

Reasor, Roderick,

Thesis (Ph. D.)--Virginia Polytechnic Institute and State University, 1990. / Vita. Abstract. Includes bibliographical references (leaves 142-148). Also available via the Internet

Mitchell, Marlon R.

Thesis (Ph.D.)--Indiana University, Instructional Systems Technology, 2007. / Source: Dissertation Abstracts International, Volume: 68-07, Section: A, page: 2763. Adviser: Thomas Schwen. Title from dissertation home page (viewed Apr. 9, 2008).

Ding, Xuedong.

Thesis (Ph.D.)--University of Nebraska-Lincoln, 2006. / Title from title screen (site viewed June 11, 2007). PDF text: viii, 133 p. : ill. UMI publication number: AAT 3239364. Includes bibliographical references. Also available in microfilm and microfiche formats.

Clay, LaTonia.

Thesis (M.S.)--Georgia State University, 2006. / Title from title screen. Yu-Sheng Hsu, committee chair; Gengsheng (Jeff) Qin, Xu Zhang, committee members. Electronic text (116 p.) : digital, PDF file. Description based on contents viewed May 17, 2007. Includes bibliographical references (p. 61-67).

Vizcain, Dorian Charles.

Dissertation (Ph.D.)--University of South Florida, 2005. / Title from PDF of title page. Document formatted into pages; contains 119 pages. Includes vita. Includes bibliographical references.

Hall, Kelli J.

Theses (M.A.)--Marshall University, 2005. / Title from document title page. Includes abstract. Document formatted into pages: contains vi, 38 pages. Bibliography: page 38.

Zhang, Dongquan.

Thesis (Ph. D.) -- University of Maryland, College Park, 2008. / Thesis research directed by: Dept. of Measurement, Statistics and Evaluation. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.

Weng, Chin-Fang .

Thesis (M.A.) -- University of Maryland, College Park, 2008. / Thesis research directed by: Dept. of Mathematics. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.

Curry, Alisha J.

Thesis (M.S.)--Pennsylvania State University, 2008. / Mode of access: World Wide Web.

Nagel, Claudia

Zugl.: Berlin, Techn. Univ., Diss., 2008

Wollack, James A.

Thesis (M.S.)--University of Wisconsin--Madison, 1993. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 34-35).

Bagchi, Ann D.

Thesis (M.S.)--University of Wisconsin--Madison, 1996. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 48-52).

Ho, Chi-San, 1982-

Report (M.S. in Statistics)--University of Texas at Austin, 2009. / Title from PDF title page (University of Texas Digital Repository, viewed on July 30, 2009). Includes bibliographical references.

Jo, Jun Sang.

Thesis (M.S. in Information Technology Management) Naval Postgraduate School, September 1995. / Thesis advisor(s): M. Suh, Keebom Kang. "September 1995." Includes bibliographical references. Also available online.

Dingerson, Lynne M.

Thesis (M.Sc.)--College of William and Mary. / Vita. Includes bibliographical references.

Caples, Jerry Joseph,

Thesis (Ph. D.)--University of Texas at Austin, 2000. / Vita. Includes bibliographical references (leaves 224-226). Available also in a digital version from Dissertation Abstracts.

Prøsch, Kristine

This master thesis compares the logistic chain of operations and maintenance versus drilling and well and finds how drilling and well affect this chain with regards to risk on crane and lifting operations. Research has been done through accident/incident analysis, statistic, observations and interviews. An influence diagram for frequency is made, to better understanding the risk influencing factors (RIF) that affects a crane and lifting operation. The influence diagram is based on operational-, ...

Shah, Mansoor Ali, Chao, Hoyu

<p><strong>Background:</strong></p><p>According to experts logistics outsourcing is a process and companies should develop their understanding about it as a process. Literature suggests a systematic and strategic approach for this process and also presents different models and aspects to improve logistics outsourcing as a process. But some scholars reveal a gap in literature regarding logistics outsourcing process in SMEs. They suggest in the discussion regarding logistics outsourcing as a proce...

Srinandphol, Niphon

Although the research in the field of the performance measurement system for remanufacturing activities is partial, an amount of literature and research has been performed regarding the performance measurement applicable for remanufacturing activities. The success of applying a performance measurement system on Remanufacturing relies on the relationship and inclusion of all perspectives; from customers to financial, as well as the remanufacturing process, and all challenges facing a remanufactur...

Fowler, Philip, Lindblad, Pernilla

No description available.

Latif, Shahid.

No description available.

Strawn, Gary W.

No description available.

Watras, Henry J.

No description available.

Haukeli, Karsten

No description available.