Results 31 to 40 of about 22,182 (267)

Bayesian estimation for the random moderation model: effect size, coverage, power of test, and type І error

Frontiers in Psychology, 2023
The random moderation model (RMM) was developed based on a two-level regression model to cope with heteroscedasticity in moderation analysis, and normal-distributed-based maximum likelihood (NML) estimation was developed to estimate the RMM.
Dan Wei, Dan Wei, Peida Zhan
doaj   +1 more source

Accurate Standard Errors in Multilevel Modeling with Heteroscedasticity: A Computationally More Efficient Jackknife Technique

Psych, 2023
In random-effects models, hierarchical linear models, or multilevel models, it is typically assumed that the variances within higher-level units are homoscedastic, meaning that they are equal across these units. However, this assumption is often violated
Steffen Zitzmann, Sebastian Weirich, Martin Hecht   +2 more
doaj   +1 more source

Tangent Exponentiated Odd Log-Logistic Weibull Quantile Regression with Applications to Complete and Censored Data [PDF]

The Egyptian Statistical Journal
A contemporary quantile regression model is formulated utilizing the tan exponentiated odd log-logistic Weibull distribution proposed in this study. The novel regression model is capable of modeling both complete and censored data, making it desirable ...
Mohammed Hashim Mustpha, Dioggban Jakperik, Suleman Nasiru   +2 more
doaj   +1 more source

Heteroscedasticity and Autocorrelation [PDF]

, 1987
One of the basic assumptions underlying the application of the LS-method is that the variances of the error terms are equal. If this assumption is not satisfied, the LS-method is no longer optimal in the Gauss-Markov sense. Linear and unbiased estimators with a smaller variance than that of the LS-estimator can then be obtained and, furthermore, the ...
Erling B. Andersen, Niels-Erik Jensen, Nils Kousgaard   +2 more
openaire   +1 more source

Hybridization of long short-term memory neural network in fractional time series modeling of inflation

Frontiers in Big Data
Inflation is capable of significantly impacting monetary policy, thereby emphasizing the need for accurate forecasts to guide decisions aimed at stabilizing inflation rates.
Erman Arif, Elin Herlinawati, Dodi Devianto, Mutia Yollanda, Dony Permana   +4 more
doaj   +1 more source

Arterial Spin‐Labeling MRI at the Cortical‐CSF Interface: A Novel Biomarker in Alzheimer Disease

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Background/Objective Arterial spin‐labeling (ASL) MRI can measure perfusion signal adjacent to CSF spaces and may provide information regarding CSF‐adjacent water transport physiology. We developed an automated pipeline to extract cortical‐CSF interface (IF) perfusion for comparison between Alzheimer disease (AD) and cognitively normal ...
Mona Asghariahmadabad, Pouya Metanat, Michael Thomas, Luke W. Bonham, Tyson Lam, Mehmet Kurt, Hong Nguyen, Tara Ellingson, Mauro Zucchelli, Stefano Casagranda, Quin Lu, Andreas M. Rauschecker, Leo Sugrue, Luis E. Savastano, Christopher P. Hess, Kamalini Ranasinghe, S. Andrew Josephson, Bruce L. Miller, Jennifer S. Yokoyama, Gil D. Rabinovici, Peter A. Ljubenkov, Lawren VandeVrede, Kambiz Nael   +22 more
wiley   +1 more source

Heteroscedastic G-Optimal Designs [PDF]

Journal of the Royal Statistical Society Series B: Statistical Methodology, 1993
SUMMARY This paper addresses the issue of constructing large sample G-optimal designs when the variability of the response varies across a compact design space. A useful characterization theorem is presented along with a computer algorithm for generating (heteroscedastic) G-optimal designs.
Wong, Weng Kee, Cook, R. Dennis
openaire   +2 more sources

Safety of Prescription Nonsteroidal Anti‐inflammatory Drugs in Adults With Inflammatory Bowel Disease: Data From a Large Administrative Claims Cohort

Arthritis Care &Research, EarlyView.
Objective The concern that nonsteroidal anti‐inflammatory drugs (NSAIDs) may precipitate flares of inflammatory bowel disease (IBD) has limited their use in managing musculoskeletal symptoms in those with IBD, but safety data are mixed. Methods This retrospective cohort study included patients with IBD aged at least 18 years from Optum's deidentified ...
Adam S. Mayer, Rui Xiao, Meenakshi Bewtra, Michael D. George, Pamela F. Weiss   +4 more
wiley   +1 more source

MENGATASI HETEROSKEDASTISITAS PADA REGRESI DENGAN MENGGUNAKAN WEIGHTED LEAST SQUARE

E-Jurnal Matematika, 2015
In the regression analysis we need a method to estimate parameters to fulfill the BLUE characteristic. There are assumptions that must be fulfilled homoscedasticity one of which is a condition in which the assumption of error variance is constant (same),
PUTU AYU MAZIYYA, I KOMANG GDE SUKARSA, NI MADE ASIH   +2 more
doaj   +1 more source

Statistical Assessment of Stress Redistribution in Loaded Polycrystals

Image Analysis and Stereology, 2022
This work deals with the analysis of stress redistribution in a polycrystal due to external loading, anisotropy of elastic properties, and microstructure characteristics. A statistical method that enables assessing relationships between stress fields and
Iva Karafiátová, Zbyněk Pawlas, Luděk Heller   +2 more
doaj   +1 more source