A re-appraisal of tests for normality

Tests for normality can be divided into two groups - those based upon a function of the empirical distribution function and those based upon a function of the original observations. The latter group of statistics test spherical symmetry and not necessarily normality. If the distribution is completely specified then the first group can be used to test for ‘spherical’ normality. However, if the distribution is incompletely specified and F‘‘x_i - x’/s’ is used these test statistics also test sphericity rather than normality. A Monte Carlo study was conducted for the completely specified case, to investigate the sensitivity of the distance tests to departures from normality when the alternative distributions are non-normal spherically symmetric laws. A “new” test statistic is proposed for testing a completely specified normal distribution     

On forecasting with univariate autoregressive processes: a bayesian approach

Using a normal-gamma prior density for the parameters of a p-th order autoregressive process, the Bayesian predictive density of k future observations is derived and it is shown that it is the product of k univariate t densities. Our results are illustrated with one step ahead forecasts employing AR(1) and AR(2) models with a vague prior density for the parameters.     

Report of the ASA Technical Panel on the Census Undercount

A new model is proposed for the joint distribution of paired survival times generated from clinical trials and certain reliability settings. The new model can be considered an extension to the bivariate exponential models studied in the literature. Here, a more flexible bivariate Weibull model will be derived, and two exact parametric tests for testing the equality of marginal survival distributions are developed.     

Creating the One-Shot Library Workshop: A Step-by-Step Guide

Abstract

Marguerite E. Horn reviews What They Don't Teach You in Library School, Betty Landesman reviews Introducing RDA, and Sarah D. Tusa reviews Coaching in the Library.     

Can property be justified in an entangled world?

ABSTRACT

As a liberal institution, private property is based upon a view of the natural order that prioritizes the individual human being over our social existence and over our nonhuman others. Colonial expansion was enabled in part by the misrecognition and denigration of indigenous land management practices. Forms of property were imposed that were incommensurable with the sustainable relationships formed by original owners with land. Given the ubiquity of the Anglosphere’s degraded and abstract understanding of property, is it possible to imagine the decolonization of property? Can property be rethought to close the divide between person and thing, and to better acknowledge the normative values of mutuality and care between people and place? What resources are there within mainstream property theory that might allow for such a reconstruction of property?     

Management of the menopause: integrated health-care pathway for the menopausal woman

Management of the menopausal woman has become controversial since publication of the results of the Women's Health Initiative and the Million Women Study from 2002 onwards. This health-care pathway summarizes the role of hormone replacement therapy and non-estrogen-based treatments as well as alternative and complementary therapies. It is based on the fifth edition of Management of the Menopause and was updated on 5 April 2011.     

‘..It takes a lot of brain space’: Understanding young carers’ lives in England and the implications for policy and practice to reduce inappropriate and excessive care work

This qualitative study, undertaken in England, explored young carers’ perspectives on the nature of their caring responsibilities. The findings are significant, particularly in the context of England's Care Act 2014, which seeks to prevent children engaging in ‘excessive’ or ‘inappropriate’ caring. Our research placed children at the heart of the debate on what constitutes appropriate care. The findings raise key questions regarding effective implementation of contemporary child policy, duties of care towards children in caring roles and priorities for child protection and family support policy and practices, with the potential to inform thinking around child's well-being in wider contexts.     

Labels and leaders: The influence of framing on leadership emergence

In two studies, this paper examines the influence of task framing on leadership emergence in mixed-gender dyads. In Study 1, we found that males are more likely to emerge as leaders when a paper-folding task is framed as masculine (i.e., Building Project) relative to feminine (i.e., Art Project). Furthermore, females are more likely to emerge as leaders when a paper-folding task is framed as feminine relative to masculine. In Study 2, we conceptually replicate these results using a weaving task (framed as Knot-Tying Task vs. Hair-Braiding Task) and find that perceived competence is the mechanism through which task framing affects leadership emergence. Taken together, these results suggest that task framing can influence the emergence of leaders because of changes in perceptions of competence. These findings are discussed in the context of related theoretical findings and managerial implications are elaborated on.     

Human Interindividual Variability in Susceptibility to Airborne Particles

Part of the explanation for the persistent epidemiological findings of associations between mortality and morbidity with relatively modest ambient exposures to airborne particles may be that some people are much more susceptible to particle-induced responses than others. This study assembled a database of quantitative observations of interindividual variability in pharmacokinetic and pharmacodynamic parameters likely to affect particle response. The pharmacodynamic responses studied included data drawn from epidemiologic studies of doses of methacholine, flour dust, and other agents that induce acute changes in lung function. In general, the amount of interindividual variability in several of these pharmacodynamic response parameters was greater than the variability in pharmacokinetic (breathing rate, deposition, and clearance) parameters. Quantitatively the results indicated that human interindividual variability of breathing rates and major pharmacokinetic parameters-total deposition and tracheobronchial clearance-were in the region of Log(GSD) = 0.1 to 0.2 (corresponding to geometric standard deviations of 10(.1)-10(.2) or 1.26-1.58). Deposition to the deep lung (alveolar region) appeared to be somewhat more variable: Log(GSD) of about 0.3 (GSD of about 2). Among pharmacodynamic parameters, changes in FEV1 in response to ozone and metabisulfite (an agent that is said to act primarily on neural receptors in the lung) were in the region of Log(GSD) of 0.2 to 0.4. However, similar responses to methacholine, an agent that acts on smooth muscle, seemed to have still more variability (0.4 to somewhat over 1.0, depending on the type of population studied). Similarly high values were suggested for particulate allergens. Central estimates of this kind of variability, and the close correspondence of the data to lognormal distributions, indicate that 99.9th percentile individuals are likely to respond at doses that are 150 to 450-fold less than would be needed in median individuals. It seems plausible that acute responses with this amount of variability could form part of the mechanistic basis for epidemiological observations of enhanced mortality in relation to ambient exposures to fine particles.