Search Results

An Investigation of the Effect of Violating the Assumption of Homogeneity of Regression Slopes in the Analysis of Covariance Model upon the F-Statistic

Description: The study seeks to determine the effect upon the F-statistic of violating the assumption of homogeneity of regression slopes in the one-way, fixed-effects analysis of covariance model. The study employs a Monte Carlo simulation technique to vary the degree of heterogeneity of regression slopes with varied sample sizes within experiments to determine the effect of such conditions. One hundred and eighty-three simulations were used.
Date: August 1972
Creator: McClaran, Virgil Rutledge
Partner: UNT Libraries

Brazil: Provincial Railroads

Description: Map showing provincial railroads in Brazil as of 1876, indicating (with red ink) those already built, in the process of being built, and projected to be built. Includes 2 tables listing location, length, distance from Rio de Janeiro and other statistics of the railroads.
Date: 1876
Creator: Imperial Instituto Artístico (Rio de Janeiro, Brazil)
Item Type: Map
Partner: UNT Libraries

Random Sampling

Description: The purpose of this study is to show the use of random sampling in solving certain mathematical problems. The origin of random numbers to be used in sampling is discussed and methods of sampling from known distributions are then given together with an indication that the sampling procedures are unbiased.
Date: January 1957
Creator: Booker, Aaron Hicks
Partner: UNT Libraries

[UNT Libraries Collection Development Dataset, 2005-2006]

Description: Dataset generated for the University of North Texas Libraries collection tabulating information about materials orders, cataloging, and circulation organized by call numbers.
Date: 2006-09~
Creator: University of North Texas. Libraries.
Item Type: Dataset
Partner: UNT Libraries

[UNT Libraries Collection Development Dataset, 2003-2004]

Description: Dataset generated for the University of North Texas Libraries collection tabulating information about materials orders, cataloging, and circulation organized by call numbers.
Date: 2004-09~
Creator: University of North Texas. Libraries.
Item Type: Dataset
Partner: UNT Libraries

[UNT Libraries Collection Development Dataset, 2006-2007]

Description: Dataset generated for the University of North Texas Libraries collection tabulating information about materials orders, cataloging, and circulation organized by call numbers.
Date: 2007-09~
Creator: University of North Texas. Libraries.
Item Type: Dataset
Partner: UNT Libraries

[UNT Libraries Collection Development Dataset, 2000-2001]

Description: Dataset generated for the University of North Texas Libraries collection tabulating information about materials orders, cataloging, and circulation organized by call numbers.
Date: 2001-09~
Creator: University of North Texas. Libraries.
Item Type: Dataset
Partner: UNT Libraries

[UNT Libraries Collection Development Dataset, 2002-2003]

Description: Dataset generated for the University of North Texas Libraries collection tabulating information about materials orders, cataloging, and circulation organized by call numbers.
Date: 2003-09~
Creator: University of North Texas. Libraries.
Item Type: Dataset
Partner: UNT Libraries

[UNT Libraries Collection Development Dataset, 2012-2013]

Description: Dataset generated for the University of North Texas Libraries collection tabulating information about materials orders, cataloging, and circulation organized by call numbers.
Date: 2013-09~
Creator: University of North Texas. Libraries.
Item Type: Dataset
Partner: UNT Libraries

[UNT Libraries Collection Development Dataset, 2008-2009]

Description: Dataset generated for the University of North Texas Libraries collection tabulating information about materials orders, cataloging, and circulation organized by call numbers.
Date: 2009-09~
Creator: University of North Texas. Libraries.
Item Type: Dataset
Partner: UNT Libraries

[UNT Libraries Collection Development Dataset, 2011-2012]

Description: Dataset generated for the University of North Texas Libraries collection tabulating information about materials orders, cataloging, and circulation organized by call numbers.
Date: 2012-09~
Creator: University of North Texas. Libraries.
Item Type: Dataset
Partner: UNT Libraries

[UNT Libraries Collection Development Dataset, 2010-2011]

Description: Dataset generated for the University of North Texas Libraries collection tabulating information about materials orders, cataloging, and circulation organized by call numbers.
Date: 2011-09~
Creator: University of North Texas. Libraries.
Item Type: Dataset
Partner: UNT Libraries

[UNT Libraries Collection Development Dataset, 2007-2008]

Description: Dataset generated for the University of North Texas Libraries collection tabulating information about materials orders, cataloging, and circulation organized by call numbers.
Date: 2008-09~
Creator: University of North Texas. Libraries.
Item Type: Dataset
Partner: UNT Libraries

[UNT Libraries Collection Development Dataset, 2009-2010]

Description: Dataset generated for the University of North Texas Libraries collection tabulating information about materials orders, cataloging, and circulation organized by call numbers.
Date: 2010~
Creator: University of North Texas. Libraries.
Item Type: Dataset
Partner: UNT Libraries

[UNT Libraries Collection Development Dataset, 2004-2005]

Description: Dataset generated for the University of North Texas Libraries collection tabulating information about materials orders, cataloging, and circulation organized by call numbers.
Date: 2005-09~
Creator: University of North Texas. Libraries.
Item Type: Dataset
Partner: UNT Libraries

The Homosexual Plague

Description: A pamphlet produced by the Christian Voice Foundation containing statistics and anti-homosexual statements, with references and Bible verses. It includes topic headings for Gay Disease -- Gay Death, Gay Politics -- Gay Power, Gay Pride - Gay Pity, and Gay Surrender.
Date: 1983
Creator: Allen, Ray
Item Type: Pamphlet
Partner: UNT Libraries Special Collections

The Gay Plague: Homosexuality and Disease

Description: A pamphlet produced by the Alert Citizens of Texas opposing homosexuality with the headings: Gay Sex, Gay Disease, AIDS, Gay Sociology, Gay Psychology, The Gay Game Plan, Gay Legal Victories, Get Involved, and References. The text includes statistics and statements on each of the topics.
Date: 1983
Creator: Alert Citizens of Texas
Item Type: Pamphlet
Partner: UNT Libraries Special Collections

Measurement Disturbance Effects on Rasch Fit Statistics and the Logit Residual Index

Description: The effects of random guessing as a measurement disturbance on Rasch fit statistics (unweighted total, weighted total, and unweighted ability between) and the Logit Residual Index (LRI) were examined through simulated data sets of varying sample sizes, test lengths, and distribution types. Three test lengths (25, 50, and 100), three sample sizes (25, 50, and 100), two item difficulty distributions (normal and uniform), and three levels of guessing (no guessing (0%), 25%, and 50%) were used in the simulations, resulting in 54 experimental conditions. The mean logit person ability for each experiment was +1. Each experimental condition was simulated once in an effort to approximate what could happen on the single administration of a four option per item multiple choice test to a group of relatively high ability persons. Previous research has shown that varying item and person parameters have no effect on Rasch fit statistics. Consequently, these parameters were used in the present study to establish realistic test conditions, but were not interpreted as effect factors in determining the results of this study.
Date: August 1997
Creator: Mount, Robert E. (Robert Earl)
Partner: UNT Libraries

An entropic approach to the analysis of time series.

Description: Statistical analysis of time series. With compelling arguments we show that the Diffusion Entropy Analysis (DEA) is the only method of the literature of the Science of Complexity that correctly determines the scaling hidden within a time series reflecting a Complex Process. The time series is thought of as a source of fluctuations, and the DEA is based on the Shannon entropy of the diffusion process generated by these fluctuations. All traditional methods of scaling analysis, instead, are based on the variance of this diffusion process. The variance methods detect the real scaling only if the Gaussian assumption holds true. We call H the scaling exponent detected by the variance methods and d the real scaling exponent. If the time series is characterized by Fractional Brownian Motion, we have H¹d and the scaling can be safely determined, in this case, by using the variance methods. If, on the contrary, the time series is characterized, for example, by Lévy statistics, H ¹ d and the variance methods cannot be used to detect the true scaling. Lévy walk yields the relation d=1/(3-2H). In the case of Lévy flights, the variance diverges and the exponent H cannot be determined, whereas the scaling d exists and can be established by using the DEA. Therefore, only the joint use of two different scaling analysis methods, the variance scaling analysis and the DEA, can assess the real nature, Gauss or Lévy or something else, of a time series. Moreover, the DEA determines the information content, under the form of Shannon entropy, or of any other convenient entopic indicator, at each time step of the process that, given a sufficiently large number of data, is expected to become diffusion with scaling. This makes it possible to study the regime of transition from dynamics to thermodynamics, non-stationary regimes, ...
Date: December 2001
Creator: Scafetta, Nicola
Partner: UNT Libraries

Combat Reconsidered: A Statistical Analysis of Small-Unit Actions During the American Civil War

Description: Historians often emphasize the physical features of battleterrain, weaponry, troop formations, earthworks, etc.in assessments of Civil War combat. Most scholars agree that these external combat conditions strongly influenced battle performance. Other historians accentuate the ways in which the mental stresses of soldiering affected combat performance. These scholars tend to agree that fighting effectiveness was influenced by such non-physical combat conditions as unit cohesion, leadership, morale, and emotional stress. Few authors argue that combat's mental influences were more significant in determining success or failure than the physical features of the battlefield. Statistical analysis of the 465 tactical engagements fought by twenty-seven Federal regiments in the First Division of the Army of the Potomac's Second Corps throughout the American Civil War suggests that the mental aspects of battle affected fighting efficiency at least as muchand probably more thancombat's physical characteristics. In other words, the soldiers' attitudes, opinions, and emotions had a somewhat stronger impact on combat performance than their actions, positions, and weaponry.
Date: December 2001
Creator: Barloon, Mark C
Partner: UNT Libraries

Data Annex to the United Nations Truth Commission on the civil war in El Salvador from 1979--1991 (digitized text)

Description: This dataset contains statistical information transcribed from the supplementary documentation of a United Nations (UN) report compiled by The Commission on the Truth for El Salvador (La Comision de la Verdad para El Salvador). It includes information about approximately 20,000 civilian/noncombatant victims of the civil war in El Salvador (from 1979 to 1991) taken from interviews of those who survived or knew/knew of those who were victims.
Date: October 2012
Creator: Mason, T. David; Hamner, Jesse & Phillips, Mark Edward
Item Type: Dataset
Partner: UNT Libraries

Informe de la Comision de la Verdad Para El Salvador: Anexos, Tomo 2

Description: Second annex published as part of the United Nations (UN) report from The Commission on the Truth for El Salvador (La Comision de la Verdad para El Salvador). This section includes supplementary documentation of the Commission's work: statistical analysis of testimony received, lists of victims, lists of disappeared persons, a list of members of the armed forces who were killed, and a list of members of the Frente Farabundo Martí para la Liberación Nacional (FMLN) who were killed.
Date: 1993
Creator: La Comision de la Verdad para El Salvador
Item Type: Report
Partner: UNT Libraries