This article describes a simple way to explain the limitations of statistics to scientists and students to avoid the publication of misleading conclusions. Biologists examine their results extremely critically and carefully choose the appropriate analytic methods depending on their scientific objectives. However, no such close attention is usually…

Longitudinal data analyses can be usefully supplemented by the plotting of individual growth curves. Unfortunately, such graphics can be challenging and tedious to produce. This article presents and demonstrates a SAS macro designed to automate this task. The OLStraj macro graphically depicts ordinary least squares (OLS)-estimated individual…

Expanding the availability of long-term care (LTC) services and making them more responsive to consumer preferences is an important goal, particularly for elderly people living in rural areas who tend to be older and have greater functional limitations but less access to the range of LTC options available in metropolitan areas. One option that…

The maximum and minimum of a sample from a probability distribution are extremely important random variables in many areas of psychological theory, methodology, and statistics. For instance, the behavior of the mean of the maximum or minimum processing time, as a function of the number of component random processing times ("n"), has been studied…

Quite often in data reduction, it is more meaningful and economical to select a subset of variables instead of reducing the dimensionality of the variable space with principal components analysis. The authors present a neglected method for variable selection called the BI-method (R. P. Bhargava & T. Ishizuka, 1981). It is a direct, simple method…

Environmental ethics examines the relationship between human beings and nature from the moral perspective. It is also a kind of ethics arising from a concern with an earth which is on the verge of losing balance. Environmental ethics originated at the end of the 1940s. Since the 1970s, great progress has been made in environmental ethics. This…

This letter presents data concerning variation in average annual temperatures by altitude and latitude, along with some suggested class exercises.

This paper uses descriptive analyses of data from the Integrated Postsecondary Education Data System to examine the status of Blacks among faculty and administrators at public higher education institutions in the South, where "status" is defined as representation in employment relative to representation among bachelor's degree…

Mathematics and statistics play important roles in peoples' lives today. A day hardly passes that they are not bombarded with many different kinds of statistics. As consumers they see statistical information as they surf the web, watch television, listen to their satellite radios, or even read the nutrition facts panel on a cereal box in the…

In sentencing research, significant negative coefficients on age research have been interpreted as evidence that actors in the criminal justice system discriminate against younger people. This interpretation is incomplete. Criminal sentencing laws generally specify punishment in terms of the number of past events in a defendant's criminal history.…

The purpose of this paper is to examine the status of employment of people with disabilities in the Federal Government and to make recommendations for improving federal hiring and advancement of employees with disabilities. The paper summarizes the legal authorities and policy guidance, the responsibilities of various federal agencies charged with…

We developed equivalent, alternate forms of easyCBM[R] in reading (n=20 forms) and mathematics (n=13 forms) with different skills reflective of the National Reading Panel (NRP) and the National Council of Teachers of Mathematics (NCTM), respectively. We then took three forms to use as screening measures in the fall, winter, and spring so educators…

This guide is designed to inform school directors about the value of a data dashboard and to provide information on how districts can create a data dashboard for school directors. A data dashboard is a tool for viewing and analyzing student achievement and performance data. Key data for monitoring student achievement and directing policy level…

This publication presents information about the outcomes for students who completed their vocational education and training (VET) during 2007. The Student Outcomes Survey focuses on students' employment outcomes and satisfaction with VET in Australia. Information about the level and type of training students undertake, further study patterns and…

This handbook was developed for high school teachers looking for new sources of timely information and ways to make courses more engaging and relevant to students. The American Community Survey (ACS) provides a wide online array of social, economic, and demographic information about the nation, states, and local communities. These data can be…