Problem 5 Roughly 450,000 vasectomies are performed each year in the United States. In this surgical procedure for contraception, the tube carying spemm from the testeles is eut. Several studses have been conducted to analyze the relationship between vasectemies and prostate cancer One such study appeared in a February 1993 issue of the Joumal of the American Medical Association. The following problem is based on data presented in that journal article of 21,300 men who have not had a vasectomy, 69 were found to have prostate cancer, and of 22,000 men who have had a vasectony, 113 were found to have prostate cancer At the 1% significance level, de the data provide sufficient evidence to conclude that men who have had a vasectomy are at greater risk of having prostate cancer? (4 marks)