Chapter 1.C, Problem 62E

Two-Circle Venn Diagram with Numbers. Use the Venn diagram to answer the following questions.

62. Tomatoes and Cancer. A study by the Harvard Medical School (Journal of the National Cancer Institute, February 17, 1999) reviewed 72 previous studies of the effect of tomatoes on cancer. The data showed convincingly that “high consumers of tomatoes and tomato products are at substantially decreased risk of numerous cancers, although probably not all cancers.” Consider the following table that shows the incidence of oral cancer for a group of people who ate an average of one tomato a day and another group of people who are fewer than three tomatoes per week. Draw a Venn diagram for the data.

	No oral cancer	Oral cancer
One tomato per day	191	9
Fewer than three tomatoes per week	164	16