A Workflow for Statistical Testing and Interpretation R package testflow version 1.0.0 Provides a unified workflow for choosing, running, and interpreting common statistical tests, from group comparisons and analysis of variance to regression, survival analysis, and diagnostic and agreement statistics. The package combines assumption checks, test selection, effect sizes, formatted results, plain-language interpretation, and a sample-size planning module covering continuous, binary, survival, ordinal, bioequivalence, and precision-based designs. Implemented methods follow standard references including Casella and Berger (2002, ISBN:9780534243128), Hollander et al. (2013, ISBN:9781118553299), Agresti (2013, ISBN:9780470463635), Cohen (1988, ISBN:9780805802832), Hosmer, Lemeshow and Sturdivant (2013, ISBN:9780470582473), and Julious (2010, ISBN:9781584887393). Software Depends: R (>= 4.1.0) Imports: stats, cli, rlang, dplyr, tidyr, tidyselect, tibble, purrr, broom, ggplot2, survival, car Suggests: testthat (>= 3.0.0), knitr, rmarkdown, effectsize, patchwork, PowerTOST, irr Imad El Badisy <elbadisyimad@gmail.com> Comprehensive R Archive Network (CRAN) Imad El Badisy [aut, cre] MIT + file LICENSE (https://CRAN.R-project.org/package=testflow/LICENSE) 2026-08-22 application/tgz https://CRAN.R-project.org/package=testflow doi:10.32614/CRAN.package.testflow