Results 21 to 30 of about 4,409,426 (307)

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

CGHpower: exploring sample size calculations for chromosomal copy number experiments [PDF]

open access: yes, 2010
Background Determining a suitable sample size is an important step in the planning of microarray experiments. Increasing the number of arrays gives more statistical power, but adds to the total cost of the experiment.
Scheinin, A.I.   +24 more
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

Do Registered Reports Improve Sample Size Planning in Psychology? An exploratory study [PDF]

open access: yes, 2022
openThe paper aims to investigate whether Registered Reports (RRs) published on OSF used a justified sample size.The paper aims to investigate whether Registered Reports (RRs) published on OSF used a justified sample ...
NORSA, REBECCA
core  

Probabilistic thinking is the name of the game: Integrating test and confidence intervals to plan sample sizes

open access: yes, 2022
Having high statistical power and good estimated precision are essential to statistical practice; however, this integrative consideration on sample size planning remains limited in the literature, especially for two-group mean comparisons with unequal ...
Luh, Wei-Ming
core   +1 more source

Sample size calculation

open access: yesInternational Journal of Ayurveda Research, 2010
Bioactive compounds from marine flora and fauna have extensive past and present use in the treatment of many diseases and serve as compounds of interest both in their natural form and as templates for synthetic modification. Several molecules isolated from various marine organisms (microorganisms, algae, fungi, invertebrates, and vertebrates) are ...
Kadam, Prashant, Bhalerao, Supriya
openaire   +6 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

The Tokophobia Severity Scale (TSS): measurement model, power and sample size considerations.

open access: yes, 2021
: To examine the measurement model of the Tokophobia Severity Scale and consider issues of statistical power and sample size from the original instrument development study.
Marshall, Claire A   +5 more
core   +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

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

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