In this paper, we investigate the conditions under which data imbalances, a common data characteristic that occurs when factor values are unevenly distributed, are problematic for the performance of Coincidence Analysis (CNA). We further examine how such imbalances relate to fragmentation and noise in data. We show that even extreme data…

Being able to characterize the size of raindrops is useful in a number of fields including meteorology, hydrology, agriculture and telecommunications. Associated with this article are data sets containing surface (i.e. ground-level) measurements of raindrop size from two different instruments and two different geographical locations. Students may…

Even a casual observer of American college athletics can see the emergence of star black athletes in conferences that once were racially segregated. By analyzing the college origins of National Football League and National Basketball Association draft choices between 1947 and 2011, this research measures the impact of higher education…

Dating violence is a serious form of violence that places students at risk for injury, death, and negative mental health sequelae. The current analysis presents data on the prevalence of dating violence over a 12-year period among a nationally representative sample of high school-attending youth in the United States, stratified by race and gender.…

This study provides a multilens examination of the diversity of full-time faculty in the United States across 11 institutional types derived from Carnegie classifications, by the intersection of race/ethnicity, citizenship, and gender and to make comparisons across time. Whereas few other studies have assessed faculty diversity for the for-profit…

This paper explores the nation's changing child population based on data from the 2010 census. While the number of U.S. children increased only slightly, the demographic shifts within the population were considerable. Some areas of the country (Nevada and Texas) and some demographic groups (including children of mixed race) grew significantly,…

Rapid technological enhancements and changes necessitate people who can understand the relation between science and technology and perceive as well as comment on technological enhancements. The aim of the present study was to determine physics students comprehension of the operation principles of wired telephone, mobile phone, and latest medical…

Two-dimensional euclidean planes and additive trees are two of the most common representations of proximity data for multidimensional scaling. Guidelines for comparing these representations and discovering properties that could help identify which representation is more appropriate for a given data set are presented. (Author/JKS)

Designed to provide librarians, library administrators, and other interested persons with information organized to facilitate comparisons of libraries within the same library system, with comparable service populations, and with comparable expenditures, this publication contains information derived from the 1985 Annual Report/System Membership…

A large-scale analysis was conducted of problem behavior by observing 20 individuals living in residential facilities. Data were converted into scatter plot formats. When the data were transformed into aggregate "control charts," 12 of 15 sets of data revealed 30-minute intervals during which problem behavior was more likely to occur.…

Global economic transformations have never been as dramatic as in the twentieth century. Most countries have experienced radical changes in the standards of income per capita, technology, fertility, mortality, income inequality and the extent of democracy in the course of the past century. It is the goal of many disciplines--economics, history,…

This set of activity sheets requires students to organize and display data with a box-and-whiskers graph. Students use the plot as a summary display to detect patterns and to highlight the important features of the data for purposes of comparison. (PK)