1.A case-controlstudy was conducted to assess the relationship between multiple sex partnersand Kaposis sarcoma, a cancer transmitted by human herpesvirus 8. Cases were men ages 24 to 40 who had beendiagnosed with Kaposis sarcoma during the six months prior to studyrecruitment. A group of men who hadnever been diagnosed with Kaposis sarcoma was selected as the control. (25 points)

		Cases	Controls	Total
Multiple sex partners	Yes	201	109	310
No	116	344	460
	Total	317	453	770

a. What arethe odds of cases among the exposed (multiple sex partners: yes)?

b. What are the odds of cases among the non-exposed (multiple sexpartners: no)?

c. Calculate and interpret the disease odds ratio for these data.

d. Calculate and interpret the 95% confidence interval for the above oddsratios.

e. Based on these data, would 3.75 be areasonable estimate of the odds ratio of Kaposis sarcoma comparing men whohave multiple sex partners with men who do not? Why or why not?