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Social and Behavioral Sciences Commons™

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Wayne State University

Journal

2005

Articles 91 - 103 of 103

Full-Text Articles in Social and Behavioral Sciences

Right-Tailed Testing Of Variance For Non-Normal Distributions, Michael C. Long, Ping Sa May 2005

Right-Tailed Testing Of Variance For Non-Normal Distributions, Michael C. Long, Ping Sa

Journal of Modern Applied Statistical Methods

A new test of variance for non-normal distribution with fewer restrictions than the current tests is proposed. Simulation study shows that the new test controls the Type I error rate well, and has power performance comparable to the competitors. In addition, it can be used without restrictions.

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Manifestation Of Differences In Item-Level Characteristics In Scale-Level Measurement Invariance Tests Of Multi-Group Confirmatory Factor Analyses, Bruno D. Zumbo, Kim H. Koh May 2005

Manifestation Of Differences In Item-Level Characteristics In Scale-Level Measurement Invariance Tests Of Multi-Group Confirmatory Factor Analyses, Bruno D. Zumbo, Kim H. Koh

Journal of Modern Applied Statistical Methods

If a researcher applies the conventional tests of scale-level measurement invariance through multi-group confirmatory factor analysis of a PC matrix and MLE to test hypotheses of strong and full measurement invariance when the researcher has a rating scale response format wherein the item characteristics are different for the two groups of respondents, do these scale-level analyses reflect (or ignore) differences in item threshold characteristics? Results of the current study demonstrate the inadequacy of judging the suitability of a measurement instrument across groups by only investigating the factor structure of the measure for the different groups with a PC matrix and …

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Some Guidelines For Using Nonparametric Methods For Modeling Data From Response Surface Designs, Christine M. Anderson-Cook, Kathryn Prewitt May 2005

Some Guidelines For Using Nonparametric Methods For Modeling Data From Response Surface Designs, Christine M. Anderson-Cook, Kathryn Prewitt

Journal of Modern Applied Statistical Methods

Traditional response surface methodology focuses on modeling responses using parametric models with designs chosen to balance cost with adequate estimation of parameters and prediction in the design space. Using nonparametric smoothing to approximate the response surface offers both opportunities as well as problems. This article explores some conditions under which these methods can be appropriately used to increase the flexibility of surfaces modeled. The Box and Draper (1987) printing ink study is considered to illustrate the methods.

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Multiple Imputation For Missing Ordinal Data, Ling Chen, Marian Toma-Drane, Robert F. Valois, J. Wanzer Drane May 2005

Multiple Imputation For Missing Ordinal Data, Ling Chen, Marian Toma-Drane, Robert F. Valois, J. Wanzer Drane

Journal of Modern Applied Statistical Methods

Simulations were used to compare complete case analysis of ordinal data with including multivariate normal imputations. MVN methods of imputation were not as good as using only complete cases. Bias and standard errors were measured against coefficients estimated from logistic regression and a standard data set.

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Letter To The Editor, Jmasm Editors May 2005

Letter To The Editor, Jmasm Editors

Journal of Modern Applied Statistical Methods

No abstract provided.

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Testing The Goodness Of Fit Of Multivariate Multiplicative-Intercept Risk Models Based On Case-Control Data, Biao Zhang May 2005

Testing The Goodness Of Fit Of Multivariate Multiplicative-Intercept Risk Models Based On Case-Control Data, Biao Zhang

Journal of Modern Applied Statistical Methods

The validity of the multivariate multiplicative-intercept risk model with I +1 categories based on casecontrol data is tested. After reparametrization, the assumed risk model is equivalent to an (I +1) -sample semiparametric model in which the I ratios of two unspecified density functions have known parametric forms. By identifying this (I +1) -sample semiparametric model, which is of intrinsic interest in general (I +1) -sample problems, with an (I +1) -sample semiparametric selection bias model, we propose a weighted Kolmogorov-Smirnov-type statistic to test the validity of the multivariate multiplicativeintercept risk model. Established are some asymptotic results …

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Coverage Properties Of Optimized Confidence Intervals For Proportions, John P. Wendell, Sharon P. Cox May 2005

Coverage Properties Of Optimized Confidence Intervals For Proportions, John P. Wendell, Sharon P. Cox

Journal of Modern Applied Statistical Methods

Wardell (1997) provided a method for constructing confidence intervals on a proportion that modifies the Clopper-Pearson (1934) interval by allowing for the upper and lower binomial tail probabilities to be set in a way that minimizes the interval width. This article investigates the coverage properties of these optimized intervals. It is found that the optimized intervals fail to provide coverage at or above the nominal rate over some portions of the binomial parameter space but may be useful as an approximate method.

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Bias Affiliated With Two Variants Of Cohen’S D When Determining U1 As A Measure Of The Percent Of Non-Overlap, David A. Walker May 2005

Bias Affiliated With Two Variants Of Cohen’S D When Determining U1 As A Measure Of The Percent Of Non-Overlap, David A. Walker

Journal of Modern Applied Statistical Methods

Variants of Cohen’s d, in this instance dt and dadj, has the largest influence on U1 measures used with smaller sample sizes, specifically when n1 and n2 = 10. This study indicated that bias for variants of d, which influence U1 measures, tends to subside and become more manageable, in terms of precision of estimation, around 1% to 2% when n1 and n2 = 20. Thus, depending on the direction of the influence, both dt and dadj are likely to manage bias in the U1 measure quite well for smaller to …

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A Longitudinal Analysis Of The Journal Of Transportation Management: 1996 - 2004, Jerry W. Wilson, Cindy H. Randall Apr 2005

A Longitudinal Analysis Of The Journal Of Transportation Management: 1996 - 2004, Jerry W. Wilson, Cindy H. Randall

Journal of Transportation Management

The first issue of the Journal of Transportation Management (JTM) was published in the Fall of 1989. This new publication was to provide an outlet for research and writing of a practical nature, of direct benefit to logistics and transportation managers and their firms. Since that first issue, the Journal has weathered three sets of editorial staff that have collectively produced sixteen full or partial volumes. This article provides some of the history of the JTM and an analysis of some of the characteristics of its contributors during the tenure of its third and current editor, Jerry Wilson.

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Financing America’S Roads: The Past Is Prologue, Michael J. Gravier, M Theodore Farris Ii Apr 2005

Financing America’S Roads: The Past Is Prologue, Michael J. Gravier, M Theodore Farris Ii

Journal of Transportation Management

This article provides a historical perspective of American roadway financing. It explores revenue collection and expenditures at the federal, state, and local governmental levels. Accounting practices of the Highway Trust Fund are discussed including the enactment of the Truth in Budgeting Act to shift revenue collection closer to a direct-user tax. Factors affecting roadway tax revenues are identified and the impact of increasing taxes is discussed. Four key considerations which will continue to shape roadway revenue collection are identified.

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The Importance Of Logistics Capability In The E-Commerce Market, Jay Joong-Kun Cho, John Ozment Apr 2005

The Importance Of Logistics Capability In The E-Commerce Market, Jay Joong-Kun Cho, John Ozment

Journal of Transportation Management

This research is focused on the importance of logistics capability and its effect on firm performance in the e-commerce market. Technology-based net companies are known to have poor business network and infrastructure compared to resource-based traditional non-net based companies. A multiple-item logistics capability measurement scale is used to measure logistics capability of the firm. Firm performance is also measured by multiple items. The results indicate that logistics capability has a positive relationship with firm performance and this relationship is stronger for net based firms than for non-net based firms. Logistics capability is perceived as the firm’s critical capability in providing …

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Regulatory Perspectives Of The Air Express Industry, Kian Chuan Chang, Mark Brian Debowski Apr 2005

Regulatory Perspectives Of The Air Express Industry, Kian Chuan Chang, Mark Brian Debowski

Journal of Transportation Management

In its early days, the international air express industry was synonymous with on-board couriers, carrying bags of documents on commercial flights. The industry has changed dramatically. That initial focus on documents has widened into the transport of packages and freight, carried by fleets of fully owned or dedicated aircraft, trucks, trains and delivery vans. The bulk of the business is dominated by 24-hour guaranteed and next-day deliveries. “Every day, hundreds of thousands of employees serve the distribution needs of an increasing number of businesses worldwide from one region to another” (European Express Association, 2002). The express companies are also making …

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Using Active Learning To Enhance Supply Chain Knowledge, Joe B. Hanna, Brian J. Gibson, Randall Chapman Apr 2005

Using Active Learning To Enhance Supply Chain Knowledge, Joe B. Hanna, Brian J. Gibson, Randall Chapman

Journal of Transportation Management

The constantly evolving logistics discipline confronts practitioners with the challenge of keeping pace with the many advancements in the field. The authors examine ways in which logistics trainers may be able to improve their ability to effectively convey knowledge to logistics practitioners by supplementing the traditional lecture-based approaches with active learning exercises. The results of a recently conducted survey detailing current usage levels and approaches of active learning exercises, specifically simulations, by logistics educators is then presented. The paper also summarizes comments from individual simulation participants after they have completed a training experience designed to immerse them in a real …

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