Results 11 to 20 of about 9,094,534 (319)

Determining Sample Size

open access: yesEDIS, 2009
Perhaps the most frequently asked question concerning sampling is "What size sample do I need?" The answer to this question is influenced by a number of factors, including the purpose of the study, population size, the risk of selecting a "bad" sample ...
Glenn D. Israel
doaj   +1 more source

Multivariate methods and small sample size: combining with small effect size [PDF]

open access: yes, 2010
This manuscript is the author's response to: "Dochtermann, N.A. & Jenkins, S.H. Multivariate methods and small sample\ud sizes, Ethology, 117, 95-101." and accompanies this paper: "Budaev, S.
Budaev, Dr. Sergey V.
core   +1 more source

Permutation-based group sequential analyses for cognitive neuroscience

open access: yesNeuroImage, 2023
Cognitive neuroscientists have been grappling with two related experimental design problems. First, the complexity of neuroimaging data (e.g. often hundreds of thousands of correlated measurements) and analysis pipelines demands bespoke, non-parametric ...
John P. Veillette   +2 more
doaj   +1 more source

Quantum state discrimination bounds for finite sample size [PDF]

open access: yes, 2012
In the problem of quantum state discrimination, one has to determine by measurements the state of a quantum system, based on the a priori side information that the true state is one of two given and completely known states, rho or sigma.
Audenaert, Koenraad M. R.   +2 more
core   +2 more sources

COMPARISON OF FREQUENTIST AND BAYESIAN APPROACHES ON SAMPLE SIZE: METHODOLOGIC STUDY

open access: yesSabiad, 2023
Objective: In the present study, we aimed to evaluate the effects of sample size on results of study by using frequentist and Bayesian approaches.Material and Methods: The small sample consisted of 32 patients with ischemic heart disease (IHD) and 37 ...
Cennet Yıldız   +3 more
doaj   +1 more source

PCA consistency in high dimension, low sample size context [PDF]

open access: yes, 2009
Principal Component Analysis (PCA) is an important tool of dimension reduction especially when the dimension (or the number of variables) is very high. Asymptotic studies where the sample size is fixed, and the dimension grows [i.e., High Dimension, Low ...
Jung, Sungkyu, Marron, J. S.
core   +3 more sources

Understanding Current Methods for Sampling of Aflatoxins in Corn and to Generate a Best Practice Framework

open access: yesToxins, 2022
Aflatoxin contamination in corn is a significant issue, posing substantial health threats to humans and animals. Aflatoxin testing protects consumer health, ensures the safe global trade of corn, and verifies compliance with legislation; however ...
Rossa Donnelly   +4 more
doaj   +1 more source

Characterising and justifying sample size sufficiency in interview-based studies: systematic analysis of qualitative health research over a 15-year period

open access: yesBMC Medical Research Methodology, 2018
Background Choosing a suitable sample size in qualitative research is an area of conceptual debate and practical uncertainty. That sample size principles, guidelines and tools have been developed to enable researchers to set, and justify the ...
Konstantina Vasileiou   +3 more
doaj   +1 more source

A Complete Sample of Megaparsec Size Double Radio Sources from SUMSS [PDF]

open access: yes, 2005
We present a complete sample of megaparsec-size double radio sources compiled from the Sydney University Molonglo Sky Survey (SUMSS). Almost complete redshift information has been obtained for the sample.
Cotter G.   +8 more
core   +3 more sources

Tamanho da amostra para avaliação de componentes do rendimento na cultura do feijoeiro Sample size to evaluate some bean agronomic characteristics

open access: yesCiência Rural, 1996
Com base em resultados de experimentos conduzidos nos anos agrícolas de 1991/92 e 1992/93 no Departamento de Fitotecnia da Universidade Federal de Santa Maria com as cultivares de feijoeiro Iraí e Macanudo, calculou-se o tamanho da amostra necessário ...
Valduíno Estefanel   +2 more
doaj   +1 more source

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