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2004

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Assessing Treatment Effects In Randomized Longitudinal Two-Group Designs With Missing Observations, James Algina, H. J. Keselman Nov 2004

Assessing Treatment Effects In Randomized Longitudinal Two-Group Designs With Missing Observations, James Algina, H. J. Keselman

Journal of Modern Applied Statistical Methods

SAS’s PROC MIXED can be problematic when analyzing data from randomized longitudinal two-group designs when observations are missing over time. Overall (1996, 1999) and colleagues found a number of procedures that are effective in controlling the number of false positives (Type I errors) and are yet sensitive (powerful) to detect treatment effects. Two favorable methods incorporate time in study and baseline scores to model the missing data mechanism; one method was a single-stage PROC MIXED ANCOVA solution and the other was a two-stage endpoint analysis using the change scores as dependent scores. Because the twostage approach can lack sensitivity to …

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Size And Power Of The Reset Test As Applied To Systems Of Equations: A Bootstrap Approach, Ghazi Shukur, Panagiotis Mantalos Nov 2004

Size And Power Of The Reset Test As Applied To Systems Of Equations: A Bootstrap Approach, Ghazi Shukur, Panagiotis Mantalos

Journal of Modern Applied Statistical Methods

The size and power of various generalization of the RESET test for functional misspecification are investigated, using the “Bootsrap critical values”, in systems ranging from one to ten equations. The properties of 8 versions of the test are studied using Monte Carlo methods. The results are then compared with another study of Shukur and Edgerton (2002), in which they used the asymptotic critical values instead and found that in general only one version of the tests works well regarding size properties. In our study, when applying the bootstrap critical values, we find that all the tests exhibits correct size even …

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Front Matter, Jmasm Editors Nov 2004

Front Matter, Jmasm Editors

Journal of Modern Applied Statistical Methods

No abstract provided.

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Variance Stabilizing Power Transformation For Time Series, Victor M. Guerrero, Rafael Perera Nov 2004

Variance Stabilizing Power Transformation For Time Series, Victor M. Guerrero, Rafael Perera

Journal of Modern Applied Statistical Methods

A confidence interval was derived for the index of a power transformation that stabilizes the variance of a time-series. The process starts from a model-independent procedure that minimizes a coefficient of variation to yield a point estimate of the transformation index. The confidence coefficient of the interval is calibrated through a simulation.

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Interval Estimation For The Scale Parameter Of Burr Type X Distribution Based On Grouped Data, Amjad D. Al-Nasser, Ayman Baklizi Nov 2004

Interval Estimation For The Scale Parameter Of Burr Type X Distribution Based On Grouped Data, Amjad D. Al-Nasser, Ayman Baklizi

Journal of Modern Applied Statistical Methods

The application of some bootstrap type intervals for the scale parameter of the Burr type X distribution with grouped data is proposed. The general asymptotic confidence interval procedure (Chen & Mi, 2001) is studied. The performance of these intervals is investigated and compared. Some of the bootstrap intervals give better performance for situations of small sample size and heavy censoring.

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Special Section: Commemorating The Retirement Of R. Clifford Blair, Jmasm Editors Nov 2004

Special Section: Commemorating The Retirement Of R. Clifford Blair, Jmasm Editors

Journal of Modern Applied Statistical Methods

This Special Section, "Commemorating the Retirement of R. Clifford Blair," contains five articles united by this section theme (also included individually above).

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Confidence Intervals On Subsets May Be Misleading, Juliet Popper Shaffer Nov 2004

Confidence Intervals On Subsets May Be Misleading, Juliet Popper Shaffer

Journal of Modern Applied Statistical Methods

A combination of hypothesis testing and confidence interval construction is often used in social and behavioral science studies. Sometimes confidence intervals are computed or reported only if a null hypothesis is rejected, perhaps to see whether the range of values is of practical importance. Sometimes they are constructed or reported only if a null hypothesis is accepted, in order to assess the range of plausible nonnull values due to inadequate power to detect them. Even if always computed, they are interpreted differently, depending on whether the null value is or is not included. Furthermore, many studies in which the null …

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On A Simple Method For Analyzing Multivariate Survival Data Using Sample Survey Methods, Pingfu Fu, J. Sunil Rao Nov 2004

On A Simple Method For Analyzing Multivariate Survival Data Using Sample Survey Methods, Pingfu Fu, J. Sunil Rao

Journal of Modern Applied Statistical Methods

A simple technique is illustrated for analyzing multivariate survival data. The data situation arises when an individual records multiple survival events, or when individuals recording single survival events are grouped into clusters. Past work has focused on developing new methods to handle such data. Here, we use a connection between Poisson regression and survival modeling and a cluster sampling approach to adjust the variance estimates. The approach requires parametric assumption for the marginal hazard function, but avoids specification of a joint multivariate survival distribution. A simulation study demonstrates the proposed approach is a competing method of recent developed marginal approaches …

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Monte Carlo Evaluation Of Ordinal D With Improved Confidence Interval, Du Feng, Norman Cliff Nov 2004

Monte Carlo Evaluation Of Ordinal D With Improved Confidence Interval, Du Feng, Norman Cliff

Journal of Modern Applied Statistical Methods

This article reports a Monte Carlo evaluation of ordinal statistic d with modified confidence intervals (CI) for location comparison of two independent groups under various conditions. Type I error rate, power, and coverage of CI of d were compared to those of the Welch's t-test.

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Confidence Elicitation And Anchoring In The Respondent-Generated Intervals (Rgi) Protocol, Liping Chu, S. James Press, Judith M. Tanur Nov 2004

Confidence Elicitation And Anchoring In The Respondent-Generated Intervals (Rgi) Protocol, Liping Chu, S. James Press, Judith M. Tanur

Journal of Modern Applied Statistical Methods

The Respondent-Generated Intervals protocol (RGI) has been used to have respondents recall the answer to a factual question by giving not only a point estimate but also bounds within which they feel it is almost certain that the true value of the quantity being reported upon falls. The RGI protocol is elaborated in this article with the goal of improving the accuracy of the estimators by introducing cueing mechanisms to direct confident (and thus presumably accurate) respondents to give shorter intervals and less confident (and thus presumably less accurate) respondents to give longer ones.

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It Is Time To Reevaulate The Toxic Release Inventory, Susan E. Dudley Nov 2004

It Is Time To Reevaulate The Toxic Release Inventory, Susan E. Dudley

Journal of Environmental and Sustainability Law

No abstract provided.

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Infotech Update, Volume 13, Number 6 November/December 2004, American Institute Of Certified Public Accountants. Information Technology Section Nov 2004

Infotech Update, Volume 13, Number 6 November/December 2004, American Institute Of Certified Public Accountants. Information Technology Section

Newsletters

No abstract provided.

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New Paleomagnetic, Rock Magnetic, And Petrographic Results From The Valle Group, Baja California, Mexico: Exploring The Causes Of Anomalously Shallow Paleomagnetic Inclinations, Yong-Xiang Li, Kenneth P. Kodama, Douglas P. Smith Nov 2004

New Paleomagnetic, Rock Magnetic, And Petrographic Results From The Valle Group, Baja California, Mexico: Exploring The Causes Of Anomalously Shallow Paleomagnetic Inclinations, Yong-Xiang Li, Kenneth P. Kodama, Douglas P. Smith

School of Natural Sciences Faculty Publications and Presentations

[1] A detailed paleomagnetic, rock magnetic, and sedimentologic study was conducted on Cenomanian‐age strata of the Valle Group at El Campito, Baja California, to examine the burial compaction effects on the paleomagnetic inclination of marine sedimentary rocks. Alternating field and thermal demagnetization isolated a characteristic remanence at 16 of 18 sites with a mean of Dec = 342.6°, Inc = 19.1°, and α95 = 3.4°. The inclination is 38.7° shallower than that predicted by the reference paleopole for North America. Laboratory experiments indicate that compaction could account for only 7.5° of the inclination shallowing. Fold tests at different scales yield …

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Re-Reifying Data, James Gibson Nov 2004

Re-Reifying Data, James Gibson

Notre Dame Law Review

No abstract provided.

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Planner, Volume 19, Number 6, November-December 2004, American Institute Of Certified Public Accountants (Aicpa) Nov 2004

Planner, Volume 19, Number 6, November-December 2004, American Institute Of Certified Public Accountants (Aicpa)

Newsletters

No abstract provided.

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Genealib Archive 2004-11, Genealib Nov 2004

Genealib Archive 2004-11, Genealib

GENEALIB Archive

No abstract provided.

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Spartan Daily, November 1, 2004, San Jose State University, School Of Journalism And Mass Communications Nov 2004

Spartan Daily, November 1, 2004, San Jose State University, School Of Journalism And Mass Communications

Spartan Daily (School of Journalism and Mass Communications)

Volume 123, Issue 44

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Theoretical Study Of The Magnetic Ordering In Rare-Earth Compounds With Face-Centered-Cubic Structure, Chun-Gang Duan, Renat F. Sabirianov, Jianjun Liu, Wai-Ning Mei, Peter A. Dowben, John R. Hardy Nov 2004

Theoretical Study Of The Magnetic Ordering In Rare-Earth Compounds With Face-Centered-Cubic Structure, Chun-Gang Duan, Renat F. Sabirianov, Jianjun Liu, Wai-Ning Mei, Peter A. Dowben, John R. Hardy

Physics Faculty Publications

We present a detailed theoretical study of the magnetic ordering in heavy rare-earth compounds with a face-centered-cubic structure. In addition to the exchange interactions which are counted up to the third nearest neighbors, the effect of the dipolar interactions and magnetic anisotropic effect are also included in our model Hamiltonian. The interactions parameters are obtained from first-principles band-structure calculations by fitting the total energies of different magnetic configurations to the Heisenberg Model. Thus from utilizing the Monte Carlo simulations, we explained the formation of different magnetic structures in the rare-earth compounds.

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Analysis Of Power Takeoff Shafts To Prevent Injuries/Fatalities, Naomi Bronson Nov 2004

Analysis Of Power Takeoff Shafts To Prevent Injuries/Fatalities, Naomi Bronson

Morehead State Theses and Dissertations

A thesis presented to the faculty of the College of Science and Technology at Morehead State University in partial fulfillment of the requirement for the Degree of Master of Science by Naomi Bronson on November 1, 2004.

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Novb2004, Robert Kelly Nov 2004

Novb2004, Robert Kelly

Robert Kelly Manuscripts

From November 2004 Robert Kelly Archive.

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Deep-Sea Image Processing, Yuri Rzhanov, Larry A. Mayer, D J. Fornari Nov 2004

Deep-Sea Image Processing, Yuri Rzhanov, Larry A. Mayer, D J. Fornari

Center for Coastal and Ocean Mapping

High-resolution seafloor mapping often requires optical methods of sensing, to confirm interpretations made from sonar data. Optical digital imagery of seafloor sites can now provide very high resolution and also provides additional cues, such as color information for sediments, biota and divers rock types. During the cruise AT11-7 of the Woods Hole Oceanographic Institution (WHOI) vessel R/V Atlantis (February 2004, East Pacific Rise) visual imagery was acquired from three sources: (1) a digital still down-looking camera mounted on the submersible Alvin, (2) observer-operated 1-and 3-chip video cameras with tilt and pan capabilities mounted on the front of Alvin, and (3) …

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A Tail-Recursive Machine With Stack Inspection, John Clements, Mathias Felleisen Nov 2004

A Tail-Recursive Machine With Stack Inspection, John Clements, Mathias Felleisen

Computer Science and Software Engineering

Security folklore holds that a security mechanism based on stack inspection is incompatible with a global tail call optimization policy; that an implementation of such a language must allocate memory for a source-code tail call, and a program that uses only tail calls (and no other memory allocating construct) may nevertheless exhaust the available memory. In this article, we prove this widely held belief wrong.We exhibit an abstract machine for a language with security stack inspection whose space consumption function is equivalent to that of the canonical tail call optimizing abstract machine. Our machine is surprisingly simple and suggests that …

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The Forum (Volume 34, Number 4), Valparaiso University School Of Law Nov 2004

The Forum (Volume 34, Number 4), Valparaiso University School Of Law

Valparaiso Law School Forum

No abstract provided.

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Sex Differences In Metabolic Rates In Field Crickets And Their Dipteran Parasitoids, Gita R. Kolluru, Mark A. Chappell, Marlene Zuk Nov 2004

Sex Differences In Metabolic Rates In Field Crickets And Their Dipteran Parasitoids, Gita R. Kolluru, Mark A. Chappell, Marlene Zuk

Biological Sciences

Sex differences in metabolic rate (MR) can result from dimorphism in the performance of energetically demanding activities. Male crickets (Teleogryllus oceanicus) engage in costly calling and aggressive activity not performed by females. Consistent with this difference, we found higher maximal MR, factorial scope, and fat content in males than females. T. oceanicus song is also costly because it attracts the parasitoid fly Ormia ochracea. Parasitized crickets had reduced maximal MR consistent with a metabolic cost to harboring larvae. This cost was greater for females, either because females invest more heavily into reproduction at the expense of metabolic …

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Interoperability And The Need For Intelligent Software, Jens G. Pohl Nov 2004

Interoperability And The Need For Intelligent Software, Jens G. Pohl

Collaborative Agent Design (CAD) Research Center

In my introduction to this year’s conference I will address six questions that I believe come to the core of our conference theme of interoperability. Do we human beings resist change? Is it in fact a human problem and not a technical problem that we are dealing with? Can non-human intelligence exist? Do we even have a need for intelligent software? How did software, particularly intelligent software (i.e., if we accept that there is such a thing) evolve over the past several decades, and what is all this talk about a Semantic Web environment? And, finally, what does the …

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Colloquy Nov 2004

Colloquy

Word Ways

A collection of responses to previously published articles.

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Roman Ways, Susan Thorpe Nov 2004

Roman Ways, Susan Thorpe

Word Ways

Wordplay based on Roman Numeral Letters (RNLs) is not new to Word Ways. Here, however, I attempt an overview of the subject, as well as introducing a variety of new RNL wordplay. As a whole, RNL wordplay can be divided conveniently into two types: non-numerical and numerical.

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Kickshaws, Dave Morice Nov 2004

Kickshaws, Dave Morice

Word Ways

A collection of linguistic kickshaws.

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Triplets, Jeremiah Farrell, Karen Farrell Nov 2004

Triplets, Jeremiah Farrell, Karen Farrell

Word Ways

TRIPLETS is a new puzzle-game we play with the help of our four good friends S A M TORCHE, ENOS TRIMBACH, NORWICH BUMSTEAD and INA CHOWBLY DUMPSTER. Readers may remember Norwich and Ina from our article "Magic Square Magic" in the May 2000 issue of Word Ways but Sam and Enos are recent acquaintances.

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Back Cover Nov 2004

Back Cover

Word Ways

Instructions to authors wishing to contribute to Word Ways.

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