R Under development (unstable) (2026-07-21 r90286 ucrt) -- "Unsuffered Consequences"
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> library(testthat)
> library(AMCP)
AMCP 2.0.0 maps to the 4th edition (2027) of Maxwell, Delaney, &
Kelley, "Designing Experiments and Analyzing Data" (Routledge). Some
tables were renumbered or removed from the 3rd edition (2018); see the
help-page Notes and news(package = "AMCP").

If you are using the 3rd edition (2018), install the last 1.x release:
    remotes::install_version("AMCP", "1.0.2")
> 
> test_check("AMCP")
[ FAIL 0 | WARN 0 | SKIP 0 | PASS 1073 ]
> 
> proc.time()
   user  system elapsed 
   6.28    2.03    8.64