Publications by Metin Bulus
A Practical Guide to Robust Standard Errors and Confidence Intervals for Standardized Mean Difference
Methods implemented in {hcttest} R package and presented here are based on the following preprint: Bulus, M. (2024, September 9). Robust Standard Errors and Confidence Intervals for Standardized Mean Difference. https://doi.org/10.31219/osf.io/k6mbs To install and load the package: library(devtools) # to install from github install_github("met...
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Databahn Plots
The {esma} R package is currently in its early stages of development. The public GitHub repository currently contains only databahn() function, which offers a fresh perspective on funnel plots, providing users with more flexible options for visualization. The name “databahn” was creatively suggested by Eren Can Aybek. The package can be ins...
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Which Cohen's d? Power Analysis for Welch's t Test
Cohen’s \(d\) from earlier literature is widely used in power analysis for sample size determination, assuming a balanced sample with equal variance. However, various unbalanced samples with unequal variances can yield the same Cohen’s \(d\). Under certain circumstances, such as hard-to-reach populations, researchers may anticipate an unbal...
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Basit Deneysel Desenlerde Örneklem Büyüklüğü Hesaplama (İstatistiksel Güç Analizi)
R ortamında pwrss paketinin kurulması ve yüklenmesi: install.packages("pwrss") library(pwrss) Alternatif olarak, aşağıdaki web uygulamasını kullanılabilir: Lütfen hata raporlarınızı, geri bildirimlerinizi veya sorularınızı bulusmetin [at] gmail.com adresine gönderin. 1 Araçlar Bilgisayar destekli eğitim üniversite öğrenc...
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R ile Güç Analizi ve Örneklem Büyüklüğü Hesaplama
CRAN üzerinde yayınlanan orijinal versiyona buradan ulaşabilirsiniz: https://cran.rstudio.com/web/packages/pwrss/vignettes/examples.html R ortamında pwrss paketinin kurulması ve yüklenmesi: install.packages("pwrss") library(pwrss) Alternatif olarak, aşağıdaki web uygulamasını kullanılabilir: Paketi ve ilgili materyali faydalı bul...
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A Practical Guide to Statistical Power and Sample Size Calculations in R
Install and load pwrss R package: install.packages("pwrss") library(pwrss) Alternatively, use the web app below: If you find the package and related material useful please cite as: Bulus, M. (2023). pwrss: Statistical Power and Sample Size Calculation Tools. R package version 0.3.1. https://CRAN.R-project.org/package=pwrss Bulus, M., & Polat...
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