Question

A study looked at wart treatment, and compared liquid nitrogen versus using duct tape (since duct tape fixes everything)

Liquid Nitrogen Duct tape Wart Cured 15 21 Wart not Cured 10 4

a) Draw a mosaic plot (you can draw by hand and include a picture of it) to represent these data. b) Calculate the odds ratio for the two therapies. Which does this odds ratio tell you? c) Statistically test whether duct tape or cryotherapy are equally likely to cure warts (if the probability of being cured is independent of the cure used), and interpret the results.

Answer 1

Graph plot on Excel.