2.2 Common types of cancer in 2012 Of all cancer cases around the world in 2012, 13% had lung cancer, 11.9% had breast cancer, 9.7% had colorectal cancer, 7.9% had prostate cancer, 6.8% had stomach cancer and 50.7% had other types of cancer (www.wcrf.org/int/cancer-facts-figures/

worldwide-data). Is the variable “cancer type” categorical or quantitative? Explain.