Data Sets to Accompany Designing Experiments and Analyzing Data: A Model Comparison Perspective (Maxwell, Delaney, and Kelley, 2027, 4th Edition) R package AMCP version 2.0.0 Data sets that accompany the book "Designing experiments and analyzing data: A model comparison perspective" (4th ed.) by Maxwell, Delaney, and Kelley (2027; ISBN 978-1-041-25384-6; Routledge). Contains all of the data sets in the book's chapters and end-of-chapter exercises. Beginning with version 2.0, the package is tailored to the 4th edition of the book; for the data as distributed with the 3rd edition (2018), install the archived version 1.0.2 from CRAN. We recommend the 'DMAR' package as the companion for carrying out the book's analyses; these analyses are illustrated in the book itself using the 'MBESS' package, which may be used as well. The book's companion website is available at <https://designingexperiments.com/> and its publisher page at <https://www.routledge.com/Designing-Experiments-and-Analyzing-Data-A-Model-Comparison-Perspective/Maxwell-Delaney-Kelley/p/book/9781041253846>. Software Depends: R (>= 4.0.0) Suggests: testthat (>= 3.0.0), knitr, rmarkdown Ken Kelley <kkelley@nd.edu> Comprehensive R Archive Network (CRAN) Scott E. Maxwell [aut], Harold D. Delaney [aut], Ken Kelley [aut, cre] GPL (>= 3) 2026-07-22 application/tgz https://CRAN.R-project.org/package=AMCP doi:10.32614/CRAN.package.AMCP en-US