Results 91 to 100 of about 345,105 (284)

Parameter Estimation based on Neoteric Ranked Set Samples with Applications to Weibull Distribution. [PDF]

open access: yesThe Egyptian Statistical Journal
This paper investigates the parameter estimation in a Weibull distribution using Neoteric Ranked Set Sampling (NRSS) designs, thus extending the earlier study by Sabry et al. (2020).
Mohamed Sabry   +2 more
doaj   +1 more source

Empirical likelihood confidence intervals for complex sampling designs

open access: yes, 2016
We define an empirical likelihood approach which gives consistent design-based confidence intervals which can be calculated without the need of variance estimates, design effects, resampling, joint inclusion probabilities and linearization, even when the
De La Riva Torres, O., Berger, Y.G.
core   +1 more source

T1 Over Squared Proton Density Ratio to Characterize Multiple Sclerosis Lesions

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Differentiating remyelinated from demyelinated lesions in MS remains challenging without histological confirmation. This study introduces the T1‐to‐PD2 ratio (TPR) imaging approach and evaluates its ability to characterize MS lesions alongside other quantitative MRI (qMRI) metrics. Methods Thirty individuals with MS (mean age: 47.5 ± 
Sarah J. Wright   +10 more
wiley   +1 more source

Composite Estimators for the Population Mean Under Ranked Set Sampling

open access: yesMathematics
Ranked Set Sampling (RSS) is an effective sampling technique, particularly when precise measurement of the study variable is costly or time-consuming, but ranking the units is relatively easy.
Sayed A. Mostafa   +2 more
doaj   +1 more source

Confidence Intervals for the Quantiles of a Finite Population: Simple Random and Stratified Simple Random Sampling

open access: yesJournal of the Royal Statistical Society Series B: Statistical Methodology, 1978
Summary Given a finite population consisting of N units, it is desired to have a confidence interval for the (t/N)th quantile, Y  (t), of the population. Assuming simple random sampling, a confidence interval procedure is suggested and several expressions for the associated confidence coefficient are given.
Sedransk, J., Meyer, J.
openaire   +2 more sources

Nested sampling for Potts models

open access: yes, 2006
Nested sampling is a new Monte Carlo method by Skilling [1] intended for general Bayesian computation. Nested sampling provides a robust alternative to annealing-based methods for computing normalizing constants.
Skilling, John   +7 more
core  

CAN SIMPLE RANDOM SAMPLING CONFIDENCE INTERVALS BE USED ON TRANSECT SAMPLING DATA?

open access: yes, 1993
When sampling geographic regions, transect sampling may be easier and cheaper than simple random sampling. However, transect sampling data is more difficult to analyze.
Noble, William, William Noble
core   +1 more source

Thalamo‐Lesional Connectivity Signatures of Bilateral Tonic–Clonic Seizures in Focal Cortical Dysplasia‐Related Epilepsy

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objectives Focal cortical dysplasia (FCD) is the most common etiology of drug‐resistant epilepsy in children. Focal to bilateral tonic–clonic seizures (FBTCS) mark a high risk of drug‐resistant epilepsy and involve thalamocortical circuitry in their generation and propagation.
Hua Xie   +8 more
wiley   +1 more source

Evaluating Sampling Methods for Content Analysis of Twitter Data

open access: yesSocial Media + Society, 2018
Despite the existing evaluation of the sampling options for periodical media content, only a few empirical studies have examined whether probability sampling methods can be applicable to social media content other than simple random sampling.
Hwalbin Kim   +3 more
doaj   +1 more source

Exact methods for comparison of estimation strategies in survey sampling.

open access: yes, 2010
PhDMany strategies in survey sampling depend on large sample approximation formulae for design-based inference on finite population parameters, which are not valid for small samples. We develop an approach using matrix algebra to tackle many problems
Khan, Kaleem Uddin
core  

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