Results 41 to 50 of about 3,879,175 (152)

Sample size for ophthalmology studies

Indian Journal of Ophthalmology, 2000
Knowledge and the usage of actual sample size formulae are a necessity as validity of the inferences from research studies is often dependent on this. This paper explains how sample sizes are calculated.
Naduvilath Thomas, John Rajesh, Dandona Lalit   +2 more
doaj  

Navigating Sample Size Estimation for Qualitative Research

Journal of Medical Evidence
There are well-established rules and methods about sample size estimation in quantitative research approaches. However, qualitative research approaches justify very little about sample size estimation principles and largely depend on subjective ...
Suresh K. Sharma, Shiv Kumar Mudgal, Rakhi Gaur, Jitender Chaturvedi, Satyaveer Rulaniya, Priya Sharma   +5 more
doaj   +1 more source

Sample size calculation formula in "before-after" intervention studies with qualitative outcomes [PDF]

Payesh
Dear Editor, In “before-after" intervention studies with qualitative outcome(s), we should not use the same formula when the outcome(s) are quantitative since the appropriate variance in this formula are not used and thus the sample size will not have ...
Ali Asghar Haeri-Mehrizi, Jila Sadighi
doaj  

Sample Size Estimation in Clinical Trials

National Journal of Community Medicine
Sample size estimation remains as a cornerstone in the meticulous planning and execution of clinical trials, pivotal for ensuring studies possess the requisite statistical power to discern meaningful treatment effects.
Divyangkumar Patel
doaj   +1 more source

Sample Size and Saturation in PhD Studies Using Qualitative Interviews

Forum: Qualitative Social Research, 2010
A number of issues can affect sample size in qualitative research; however, the guiding principle should be the concept of saturation. This has been explored in detail by a number of authors but is still hotly debated, and some say little understood.
Mark Mason
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SAMPLE SIZE DETERMINATION FOR AGRONOMIC EXPERIMENTS

The Iraqi Journal of Agricultural science
Determining sample size to estimate the mean value of a target (infinite) population is of prime importance to have correct results and conclusions. In general, sample sizes differ as the studied objects differ.
Medhat M. Elsahookie, A. A. Dawood
doaj   +1 more source

Analyzing Sample Size in Information-Theoretic Models

Mathematics
In this paper, we delve into the complexities of information-theoretic models, specifically focusing on how we can model sample size and how it affects our previous findings.
D. Bernal-Casas, J. M. Oller
doaj   +1 more source

Sample size calculation in clinical research

Perspectives in Clinical Research
Calculation of sample size is an essential part of research study design since it affects the reliability and feasibility of the research study. In this article, we look at the principles of sample size calculation for different types of research studies.
Priya Ranganathan, Vishal Deo, C. S. Pramesh   +2 more
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Sample size determination in medical researches

مجله علمی دانشگاه علوم پزشکی کردستان, 2020
Background and Aim: One of the problems of the researchers at the start of the research is the estimation of sample size and selection of an appropriate sample of the population. Small sample size can damage research credibility and lead to loss of money
Daem Roshani, Bijan Nouri, Masoud Moradi
doaj  

Sample size in health research

New Zealand Medical Student Journal, 2021
Ari Samaranayaka, Claire Cameron, Robin Turner   +2 more
doaj   +1 more source