Parallel boxplots in a 2-sample problem need to be compared regarding their location, scale, skewness, symmetry, and outliers. Data are drawn randomly from a suitable data-generating process so that each multiple-choice item is either about correct or clearly wrong.
Random numbers, text blocks, and graphics
Verbatim R input/output:
library("exams") set.seed(1090) exams2html("boxplots.Rnw") set.seed(1090) exams2pdf("boxplots.Rnw") set.seed(1090) exams2html("boxplots.Rmd") set.seed(1090) exams2pdf("boxplots.Rmd")