Question 3

In this question, you will construct a randomisation distribution using the data in the following table. These data are based on a study in which dogs were trained to smell cancer in breath and stool samples. To train the dogs, cancer patients who had just been diagnosed and healthy control adults were asked to breathe into a tube and provide a stool sample. Dogs were then trained to sit if a sample came from a cancer patient. After training, the dogs were presented with samples from new subjects, with the samples randomly presented in a double-blind experiment.

Breath test Stool test Dog identifies cancer 23 37 Dog does not identify caner 13 11 Total 36 48