Results 21 to 30 of about 4,430,595 (297)

The effect of random-effects misspecification on classification accuracy [PDF]

open access: yesThe International Journal of Biostatistics, 2021
Abstract Mixed models are a useful way of analysing longitudinal data. Random effects terms allow modelling of patient specific deviations from the overall trend over time. Correlation between repeated measurements are captured by specifying a joint distribution for all random effects in a model.
Riham El Saeiti   +2 more
openaire   +3 more sources

Extension of Nakagawa & Schielzeth's R2GLMM to random slopes models [PDF]

open access: yes, 2014
1.Nakagawa & Schielzeth extended the widely used goodness-of-fit statistic R2 to apply to generalized linear mixed models (GLMMs). However, their R2GLMM method is restricted to models with the simplest random effects structure, known as random ...
Johnson, Paul C.D.
core   +2 more sources

Misspecification in Generalized Linear Mixed Models and Its Impact on the Statistical Wald Test

open access: yesApplied Sciences, 2023
Generalized linear mixed models are commonly used in repeated measurement studies and account for the dependence between observations obtained from the same experimental unit.
Diana Arango-Botero   +2 more
doaj   +1 more source

Statistical Inference of Wiener Constant-Stress Accelerated Degradation Model with Random Effects

open access: yesMathematics, 2022
In the field of reliability analysis, the constant-stress accelerated degradation test is one of the most commonly used methods to evaluate a product’s reliability as degradation data are provided. In this paper, a constant-stress accelerated degradation
Peihua Jiang
doaj   +1 more source

A Bayesian localised conditional auto-regressive model for estimating the health effects of air pollution [PDF]

open access: yes, 2013
Estimation of the long-term health effects of air pollution is a challenging task, especially when modeling spatial small-area disease incidence data in an ecological study design.
Besag   +19 more
core   +2 more sources

The effect of splitting on random forests [PDF]

open access: yesMachine Learning, 2014
The effect of a splitting rule on random forests (RF) is systematically studied for regression and classification problems. A class of weighted splitting rules, which includes as special cases CART weighted variance splitting and Gini index splitting, are studied in detail and shown to possess a unique adaptive property to signal and noise. We show for
openaire   +2 more sources

Modelling the distribution of health related quality of life of advancedmelanoma patients in a longitudinal multi-centre clinical trial using M-quantile random effects regression [PDF]

open access: yes, 2018
Health-related quality of life assessment is important in the clinical evaluation of patients with metastatic disease that may offer useful information in understanding the clinical effectiveness of a treatment.
Bianco, Paola Del   +4 more
core   +2 more sources

On Fitting Generalized Linear Mixed Effects Models for Longitudinal Binary Data Using Different Correlation Structures

open access: yesRevstat Statistical Journal, 2018
The generalized linear mixed effects model (GLMM) approach is widely used to analyze longitudinal binary data when the goal of the study is a subject-specific interpretation because it allows missing values on the response, provided they are missing at ...
M. Salomé Cabral   +1 more
doaj   +1 more source

Effective Bi-immunity and Randomness [PDF]

open access: yes, 2016
We study the relationship between randomness and effective bi-immunity. Greenberg and Miller have shown that for any oracle X, there are arbitrarily slow-growing DNR functions relative to X that compute no ML random set. We show that the same holds when ML randomness is replaced with effective bi-immunity.
Achilles A. Beros   +2 more
openaire   +2 more sources

Mixed Effects in Stochastic Differential Equation Models

open access: yesRevstat Statistical Journal, 2005
A class of statistical models is proposed where random effects are incorporated into a stochastic differential equations model, and an expression for the likelihood function is derived.
Susanne Ditlevsen , Andrea De Gaetano
doaj   +1 more source

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