A jamovi module to calculate Student's and Welch's t-Test (including related Cohen's d) based on summary data (mean, standard deviation, and sample size) for both groups, to comprehend reported tests if raw-data are not available.
jamovi module. Sources for in R-code used packages and statistical formulas are mentioned below and in the comments of the code-files.
Currently only available via Sideload. After installation you find the function in tab "T-Tests" under the new entry "Independent Samples Test for Summary Data".
We encourage you to send bug reports, suggestions or questions.
Cohen, J. (1988). Statistical power analysis for the behavioral sciences (2nd ed). L. Erlbaum Associates.
Eid, M., Gollwitzer, M., & Schmitt, M. (2017). Statistik und Forschungsmethoden (5., korrigierte Auflage). Beltz.
R Core Team. (2024). R: A Language and Environment for Statistical Computing (Version 4.4.1) [Computer Software]. R Foundation for Statistical Computing. https://www.R-project.org/
Revelle, W. (2024). psych: Procedures for Psychological, Psychometric, and Personality Research (Version 2.4.6.26) [R package]. https://cran.r-project.org/web/packages/psych/index.html
Wickham, H., Chang, W., Henry, L., Pedersen, T. L., Takahashi, K., Wilke, C., Woo, K., Yutani, H., Dunnington, D., & van den Brand, T. (2024). ggplot2: Create Elegant Data Visualisations Using the Grammar of Graphics (Version 3.5.1) [R package]. Posit, PBC. https://cran.r-project.org/package=ggplot2