The purpose of this study was to determine the total number and distribution of the physically handicapped in Nebraska in order to provide them with adequate library service. The report defines the physically handicapped as "residents of the United States certified by competent authority as unable to read normal printed materials as a result…

The power of the t, expected normal scores, Mann-Whitney U, Tukey, a modified Mann-Whitney U, and an adaptive procedure were investigated when sampling from population models empirically developed from test score distributions. The models used were selected members of the beta family. This investigation was unique in that not only did the means of…

Total farm population has continued to decrease; the April 1968 average of 10,454,000 persons reflected an estimated drop of 421,000 since April 1967. The regional distribution remained the same, however, with the largest concentration in the South, about 45 percent, while the North Central Region ranked second with 39 percent. During 1967-1968,…

Hispanos have an important part to play in the 1980 census. The Spanish-speaking population needs the information provided by the census and the census needs the help Hispanos can give. It is a two-way street that can be mutually beneficial to everyone involved. (Editor/NQ)

Crews of 18 U.S. Navy combat vessels rated their living and working conditions aboard ship, including degree of crowding. Three different types of measures corresponding to different definitions of crowding were constructed. These separate crowding measures correlated uniquely with satisfaction and illness criteria. (Author/MA)

This essay offers a step-by-step tool which librarians can use with appropriate data to determine the success of a branch library in reaching the potential user, or for indicating population needs not being satisfied. (Author/KP)

This article deals with the problems of modeling the population densities of cities. Two types of models, the quadratic gamma and the equilibrium, are discussed and compared. (Author/MK)

It is demonstrated that, in the presence of population information, a linear combination of true scores can be estimated more efficiently than by the same linear combination of the observed scores. Three criteria for optimality are discussed, but they yield the same solution, described as a multivariate shrinkage estimator. (Author/SLD)

Introduces the Global Positioning System (GPS) and explains its use in the science classroom. (YDS)

In IRT models, responses are explained on the basis of person and item effects. Person effects are usually defined as a random sample from a population distribution. Regular IRT models therefore can be formulated as multilevel models, including a within-person part and a between-person part. In a similar way, the effects of the items can be…

The "29th Annual Report to Congress on the Implementation of the Individuals with Disabilities Education Act, 2007" focuses on key state performance data in accordance with recommendations of the President's Commission on Excellence in Special Education. Volume 1 focuses on the children and students being served under "IDEA"…

The purpose of this paper is to introduce a new method for fitting item response theory models with the latent population distribution estimated from the data using splines. A spline-based density estimation system provides a flexible alternative to existing procedures that use a normal distribution, or a different functional form, for the…

This paper traces the shifts in New Hampshire's state and county population during the nineteenth and twentieth centuries, focusing on the growth of urban centers and industry. From 1790 to 1840 most of New Hampshire's population growth was agricultural despite the beginnings of industrialization and urbanization. These processes greatly…