Consider the data of Exercise 13.2.15. Conduct an appropriate analysis of the data.
Exercise 13.2.15
Researchers studied persons who had received intravenous immune globulin (IGIV) to see if they had developed infections of hepatitis C virus (HCV). In part of their analysis, they considered doses of Gammagard (an IGIV product) received by 201 patients. They divided the patients into 4 groups according to the number of doses of "Gammagard made from unscreened or first-generation anti-HCV-screened plasma." Among 48 persons who received 0 to 3 doses, there were 4 cases of HCV infection. There were 2 cases of HCV infection among 45 persons who received 4 to 20 doses, there were 7 cases of HCV infection in the 57 persons who received between 21 and 65 doses, and there were 10 cases of HCV infection among the 51 persons who received more than 65 doses. What type of analysis is appropriate for these data?