This document describes a mathematical model designed to produce a weighted, standardized index that can be used to represent a statistically unbiased measure of a Future Farmers of America (FFA) chapter's level of activity in relation to other chapters in Ohio. The index, called the FFA Chapter Activity Index, is expected to be applicable to…

Discusses some rapid statistical methods which are intended for use by physics teachers. Part one of this article gives some of the simplest and most commonly useful rapid methods. Part two gives references to the relevant theory together with some alternative and additional methods. (HM)

The work presented in this paper defined conceptually the concepts of multidimensional discrimination and information, derived mathematical expressions for the concepts for a particular multidimensional item response theory (IRT) model, and applied the concepts to actual test data. Multidimensional discrimination was defined as a function of the…