, WRS2, PairedData and this implementation. For this reason, most comparisons in R are made against PairedData's method. Rather than providing the input and output for all evaluations, here is a representative example: > library(PairedData) > a <- c(1, 2, 3) > b <- c(1.1, 2.9, 4.2) > options(digits=16) > yuen.t.test(a, b, tr=.2) Two-sample Yuen test, trim=0.2 data: x and y t = -0.68649512735573, df = 3.4104431643464, p-value = 0.5361949075313 alternative hypothesis: true difference in trimmed means is not equal to 0 95 percent confidence interval: -3.912777195645217 2.446110528978550 sample estimates: trimmed mean of x trimmed mean of y 2.000000000000000 2.73333333333333 Fİ