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A Review of Sample Size Determination for Common Experi-mental Designs: Further Simplified Equations [PDF]

مجلة جامعة النجاح للأبحاث العلوم الطبيعية
Determination of the required sample size is an important step in the planning of any research study. A large number of commercial and online resources are readily available for calculation of sample size required for various research designs.
Jihad M. Abdallah
doaj   +1 more source

A Power Calculator for the Classical Twin Design [PDF]

, 2016
Power is a ubiquitous, though often overlooked, component of any statistical analyses. Almost every funding agency and institutional review board requires that some sort of power analysis is conducted prior to data collection.
Verhulst, Brad
core   +2 more sources

Utilizing harmonization and common surveillance methods to consolidate 4 cohorts: the Western Alaska Tribal Collaborative for Health (WATCH) study [PDF]

International Journal of Circumpolar Health, 2013
Background. According to health status reports, chronic disease prevalence appears to be rising in western Alaska Native (AN) people, and accurate population-based data are needed.
Kathryn R. Koller, Abbie W. Wolfe, Jesse S. Metzger, Melissa A. Austin, Scarlett E. Hopkins, Cristiane Kaufmann, Stacey E. Jolly, Sven O.E. Ebbesson, Jason G. Umans, Barbara V. Howard, Bert B. Boyer   +10 more
doaj   +1 more source

A farewell to Bonferroni: the problems of low statistical power and publication bias

Behavioral Ecology, 2004
Recently, Jennions and Moller (2003) carried out a metaanalysis on statistical power in the field of behavioral ecology and animal behavior, reviewing 10 leading journals including Behavioral Ecology.
Shinichi Nakagawa
semanticscholar   +1 more source

Power Analyses for Moderator Effects With (Non)Randomly Varying Slopes in Cluster Randomized Trials

Methodology, 2021
Researchers often apply moderation analyses to examine whether the effects of an intervention differ conditional on individual or cluster moderator variables such as gender, pretest, or school size.
Nianbo Dong, Jessaca Spybrook, Benjamin Kelcey, Metin Bulus   +3 more
doaj   +1 more source

Primordial statistical anisotropy generated at the end of inflation

, 2011
We present a new mechanism for generating primordial statistical anisotropy of curvature perturbations. We introduce a vector field which has a non-minimal kinetic term and couples with a waterfall field in hybrid inflation model.
Alabidi L, Armendariz-Picon C, Armendariz-Picon C, Dimopoulos K Karciauskas M, Eriksen H K, Eriksen H K, Eriksen H K, Golovnev A Mukhanov V Vanchurin V, Gumrukcuoglu A E, Hajian A, Jaffe T R, Jiro Soda, Koivisto T Mota D F, Koivisto T S Mota D F, Lyth D H, Lyth D H, Maldacena J M, Martin J, Pereira T S, Pitrou C, Planck Collaboration, Sasaki M, Schild R E Gibson C H, Shuichiro Yokoyama   +23 more
core   +1 more source

Power-law size distributions in geoscience revisited

, 2019
The size or energy of diverse structures or phenomena in geoscience appears to follow power-law distributions. A rigorous statistical analysis of such observations is tricky, though.
Corral, Álvaro, González, Álvaro
core   +1 more source

Statistical Classification of Cascading Failures in Power Grids [PDF]

, 2010
We introduce a new microscopic model of the outages in transmission power grids. This model accounts for the automatic response of the grid to load fluctuations that take place on the scale of minutes, when the optimum power flow adjustments and load ...
Chertkov, Michael, Pfitzner, René, Turitsyn, Konstantin   +2 more
core   +3 more sources

Methodological reporting behavior, sample sizes, and statistical power in studies of event-related potentials: Barriers to reproducibility and replicability.

Psychophysiology, 2019
Methodological reporting guidelines for studies of ERPs were updated in Psychophysiology in 2014. These guidelines facilitate the communication of key methodological parameters (e.g., preprocessing steps).
P. Clayson, Kaylie A. Carbine, S. Baldwin, M. Larson   +3 more
semanticscholar   +1 more source

Chasing Unbiased Spectra of the Universe

, 2013
The cosmological power spectrum of the coherent matter flow is measured exploiting an improved prescription for the apparent anisotropic clustering pattern in redshift space.
Kayo, Issha, Nishimichi, Takahiro, Song, Yong-Seon, Taruya, Atsushi   +3 more
core   +2 more sources