A Dichotomous Behavior of Guttman-Kaiser Criterion from Equi-Correlated Normal Population

A Note on the Eigensystem of the Covariance Matrix of Dichotomous Guttman Items

We consider the covariance matrix for dichotomous Guttman items under a set of uniformity conditions, and obtain closed-form expressions for the eigenvalues and eigenvectors of the matrix. In particular, we describe the eigenvalues and eigenvectors of the matrix in terms of trigonometric functions of the number of items. Our results parallel those of Zwick (1987) for the correlation matrix unde...

Prediction of a dichotomous criterion variable by means of a logical combination of dichotomous predictors

© Centre d’analyse et de mathématiques sociales de l’EHESS, 1988, tous droits réservés. L’accès aux archives de la revue « Mathématiques et sciences humaines » (http://msh.revues. org/) implique l’accord avec les conditions générales d’utilisation (http://www.numdam.org/legal. php). Toute utilisation commerciale ou impression systématique est constitutive d’une infraction pénale. Toute copie ou...

Non-response in Sampling from a Dichotomous Finite Population Non-response in Sampling from a Dichotomous Finite Population (^223^66)

Robust tests for testing the parameters of a normal population

This article aims to provide a simple robust method to test the parameters of a normal population by using the new diagnostic tool called the “Forward Search” (FS) method. The most commonly used procedures to test the mean and variance of a normal distribution are Student’s t test and Chi-square test, respectively. These tests suffer from the presence of outliers. We introduce the FS version of...

Anatomy of a supergroup: does a criterion of normal perimetric performance generate a supernormal population?

PURPOSE To interpret individual results from automated perimeters, a normative database must be developed. Typically, a set of criteria determines those subjects that may be included in the database. This study examined whether a criterion of normal performance on an established perimeter generates a subgroup with supernormal perimetric performance. METHODS The right-eye perimetric results of...