Results 11 to 20 of about 232,423 (182)

On the implementation of stratified two-stage simple random sampling without replacement, with possible collapsed strata [PDF]

MethodsX
Two-stage stratified sampling is a complex design that involves nested sampling units and stratification. This complexity increases when the strata have too few sampled units for variance estimation, necessitating the use of collapsed strata, where ...
Philippe Aubry
doaj   +2 more sources

Log-ratio type estimation for the finite population mean under simple random sampling without replacement with theory, simulation and application [PDF]

Scientific Reports
We propose two novel logarithmic ratio–type estimators for the finite-population mean under simple random sampling without replacement (SRSWOR). The estimators integrate a logarithmic transformation of the auxiliary variable to stabilize variance, reduce
Fazal Shakoor, Muhammad Atif, Hameed Ali, Abdulrahman Obaid Alshammari, Bilal Himmat, Khaled Kefi   +5 more
doaj   +2 more sources

Nested case–control sampling without replacement [PDF]

Lifetime Data Analysis
AbstractNested case–control design (NCC) is a cost-effective outcome-dependent design in epidemiology that collects all cases and a fixed number of controls at the time of case diagnosis from a large cohort. Due to inefficiency relative to full cohort studies, previous research developed various estimation methodologies but changing designs in the ...
Yei Eun Shin, Takumi Saegusa
openaire   +4 more sources

Simple random sampling with over-replacement

Journal of Statistical Planning and Inference, 2011
Yves Tille
exaly   +2 more sources

Effect of mobile interventions with nicotine replacement therapy sampling on long-term smoking cessation in community smokers: A pragmatic randomized clinical trial

Tobacco Induced Diseases, 2023
Introduction Mobile interventions enable personalized behavioral support that could improve smoking cessation (SC) in smokers ready to quit. Scalable interventions, including unmotivated smokers, are needed.
Ningyuan Guo, Tzu Tsun Luk, Yongda Socrates Wu, Ziqiu Guo, Jessica Chi Lok Chu, Yee Tak Derek Cheung, Ching Han Helen Chan, Tyrone Tai On Kwok, Victor Yiu Lun Wong, Carlos King Ho Wong, Jung Jae Lee, Yu Kwong Kwok, Kasisomayajula Viswanath, Tai Hing Lam, Man Ping Wang   +14 more
doaj   +1 more source

Access recirculation in continuous kidney replacement therapy with regional citrate anticoagulation: a case report and diagnostic insights [PDF]

BMC Nephrology
Background Vascular access recirculation (AR) is an underrecognized but clinically significant cause of inadequate solute clearance during continuous kidney replacement therapy (CKRT).
Shu Huei Neo, Zhong Hong Liew, Manish Kaushik, For the S.I.N:G.A.P.O.R.E Initiative (Science in Nephrology: Growth and Progress of Research and Education)   +3 more
doaj   +2 more sources

Evaluation of Sampling with Partial Replacement and Double Sampling in a Managed Forest in the Brazilian Amazon

Floresta e Ambiente, 2023
We compared sampling techniques in a managed native forest in Paragominas, Pará, Brazil. Our goal in this study was to evaluate the feasibility of using Double Sampling (DS) and Sampling with Partial Replacement (SPR), when compared to Continuous Forest ...
Jorge L. Reategui-Betancourt, Lucas Mazzei, Alba Valéria Rezende, Guido Briceño, Carlos Magno Moreira de Oliveira, Tatiana Dias Gaui, Salman Khan, Axa Emanuelle S. Figueiredo   +7 more
doaj   +1 more source

An Asymptotic Variance Formula for Sampling Without Replacement with Unequal Probabilities [PDF]

The Egyptian Statistical Journal, 1972
Asymptotic formulae for the variance of the Horvitz and Thompson Estimator for sampling with unequal probabilities without replacement have e inter previously been derived for a number of particular sampling procedures.
Muhammad Hanif
doaj   +1 more source

A comparison of pivotal sampling and unequal probability sampling with replacement [PDF]

, 2016
We prove that any implementation of pivotal sampling is more efficient than multinomial sampling. This yields the weak consistency of the Horvitz Thompson estimator and the existence of a conservative variance estimator. A small simulation study supports
G. Chauvet, A. Ruiz-Gazen
semanticscholar   +1 more source

A Bootstrap Variance Estimation Method for Multistage Sampling and Two-Phase Sampling When Poisson Sampling Is Used at the Second Phase

Stats, 2022
The bootstrap method is often used for variance estimation in sample surveys with a stratified multistage sampling design. It is typically implemented by producing a set of bootstrap weights that is made available to users and that accounts for the ...
Jean-François Beaumont, Nelson Émond
doaj   +1 more source