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Relative power and sample size analysis on gene expression profiling data [PDF]
, 2009 Background: With the increasing number of expression profiling technologies, researchers today are confronted with choosing the technology that has sufficient power with minimal sample size, in order to reduce cost and time.
Iterson, M. van +38 more
core +1 more source
Sample Size Determination [PDF]
ILAR Journal, 2002 Scientists who use animals in research must justify the number of animals to be used, and committees that review proposals to use animals in research must review this justification to ensure the appropriateness of the number of animals to be used.
Ralph B, Dell +2 more
openaire +2 more sources
American Journal of Epidemiology, 2005 The belief is widespread that studies are unethical if their sample size is not large enough to ensure adequate power. The authors examine how sample size influences the balance that determines the ethical acceptability of a study: the balance between the burdens that participants accept and the clinical or scientific value that a study can be expected
Bacchetti, Peter +3 more
openaire +2 more sources
Ciência 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
Published correlational effect sizes in social and developmental psychology
Royal Society Open Science, 2022 The distribution of effect sizes may offer insights about the research done and reported in a scientific field. We have evaluated 12 412 manually collected correlation effect sizes (Sample 1) and 31 157 computer-extracted correlation effect sizes (Sample
Josefína Weinerová +2 more
doaj +1 more source
Weak Limit of Sample Range and Midrange For Random Sample Sizes [PDF]
The Egyptian Statistical Journal, 1990 The present work deals with the weak convergence of sample range and midrange when the sample size is a positive integer-valued random variable (r.v.).
H. Barakat, E. Nigm
doaj +1 more source
Sample size calculation: Basic principles
Indian Journal of Anaesthesia, 2016 Addressing a sample size is a practical issue that has to be solved during planning and designing stage of the study. The aim of any clinical research is to detect the actual difference between two groups (power) and to provide an estimate of the ...
Sabyasachi Das +2 more
doaj +1 more source
Methodological considerations for the design and implementation of reliable and valid web surveys
Public Health and Toxicology, 2021 This article examines practical epidemiology principles related to the design and implementation of web surveys. Six practice-oriented items are critically examined: 1) The study question; 2) The target population; 3) Study population needed; 4) Sampling
Israel Agaku
doaj +1 more source
The just-about-right pilot sample size to control the error margin
, 2023 In practice, the required sample size for a two-arm randomised controlled trial cannot always be determined pre-study with great accuracy. This lack of accuracy has economic, ethical and scientific implications.
Toher, Deirdre +2 more
core +1 more source