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How to Address Non-normality: A Taxonomy of Approaches, Reviewed, and Illustrated [PDF]

open access: yesFrontiers in Psychology, 2018
The linear model often serves as a starting point for applying statistics in psychology. Often, formal training beyond the linear model is limited, creating a potential pedagogical gap because of the pervasiveness of data non-normality.
Jolynn Pek   +3 more
doaj   +4 more sources

On the Conditional Value at Risk Based on the Laplace Distribution with Application in GARCH Model

open access: yesMathematics, 2022
In this article, the Laplace distribution is employed in lieu of the well-known normal distribution for finding better scalar values of risk. Explicit formulas for value-at-risk (VaR) and conditional value-at-risk (CVaR) are studied and used to manage ...
Malik Zaka Ullah   +3 more
doaj   +1 more source

Explicit non-normal modal logic [PDF]

open access: yesJournal of Logic and Computation, 2021
Abstract Faroldi argues that deontic modals are hyperintensional and thus traditional modal logic cannot provide an appropriate formalization of deontic situations. To overcome this issue, we introduce novel justification logics as hyperintensional analogues to non-normal modal logics. We establish soundness and completeness with respect
Rohani, Atefeh, Studer, Thomas
openaire   +2 more sources

Genotype Selection for Grain Yield of Sorghum through Generalized Linear Mixed Model

open access: yesAgronomy, 2023
The classical model only provides a correct analysis if all the effects are fixed. For experiments that include fixed and random effects, the general linear mixed model is appropriate for handling the non-normal distributed response variables. The aim of
Mulugeta Tesfa   +4 more
doaj   +1 more source

One-Way and Two-Way ANOVA: Inferences About a Robust, Heteroscedastic Measure of Effect Size

open access: yesMethodology, 2022
Consider a one-way or two-way ANOVA design. Typically, groups are compared based on some measure of location. The paper suggests alternative methods where measures of location are replaced by a robust measure of effect size that is based in part on a ...
Rand Wilcox
doaj   +1 more source

Managing the Assumption of Normality within the General Linear Model with Small Samples: Guidelines for Researchers Regarding If, When and How. [PDF]

open access: yesTutorials in Quantitative Methods for Psychology, 2023
Academic textbooks, statistical literature, and publication guidelines provide conflicting, ambiguous and often incomplete answers to the question of how researchers should handle the normality assumption for classical general linear model tests when ...
Zygmont, Conrad Stanisław
doaj   +1 more source

A New Robust Multivariate EWMA Dispersion Control Chart for Individual Observations

open access: yesMathematics, 2021
A multivariate control chart is proposed to detect changes in the process dispersion of multiple correlated quality characteristics. We focus on individual observations, where we monitor the data vector-by-vector rather than in (rational) subgroups.
Jimoh Olawale Ajadi   +2 more
doaj   +1 more source

Non-Normal Market Losses and Spatial Dependence Using Uncertainty Indices

open access: yesMathematics, 2022
We analyse spatial dependence between the risks of stock markets. An alternative definition of neighbour is used and is based on a proposed exogenous criterion obtained with a dynamic Google Trends Uncertainty Index (GTUI) designed specifically for this ...
Catalina Bolancé   +2 more
doaj   +1 more source

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