Computing all joint and marginal probabilities (in percent) in a fourfold table based on two randomly-generated conditional probabilities and one marginal probability. The exercise is a cloze with nine numeric answers presented in a table layout using Moodle-specific markup.
Verbatim R input/output:
(Note that the HTML output contains mathematical equations in MathML. It is displayed by browsers with MathML support like Firefox or Safari - but not Chrome.)
library("exams") set.seed(1090) exams2html("fourfold2.Rnw") set.seed(1090) exams2pdf("fourfold2.Rnw") set.seed(1090) exams2html("fourfold2.Rmd") set.seed(1090) exams2pdf("fourfold2.Rmd")