Dr. RP. Beasley and his colleagues are interested in the association of hepatitis 8 viral infection (HBV) and liver cancer in Taiwan. They had data available from a survey of 22,707 male government workers. Of these men, 3,454 tested positive for antibodies to the HBV surface antigen (H BsAg) and 161 were confirmed to have liver cancer. The following table summarizes their data. HBsAg # tested I Liver Cancer Positive I 3,454 152 Negative 19,253 9 1.What type of study design is described here? Explain: 2. Calculate the appropriate measure of association for this study and its corresponding 95% Cl. 3. State hypotheses and interpret the results. Does HBV cause liver cancer