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Credit goes to r-pkg.org

Packages by Alexander Coppock

DeclareDesign — 1.1.0

Declare and Diagnose Research Designs

randomizr — 1.0.0

Easy-to-Use Tools for Common Forms of Random Assignment and Sampling

ri2 — 0.4.1

Randomization Inference for Randomized Experiments

vayr — 1.0.0

Extensions for 'ggplot2' to Visualize as You Randomize