1. Calculate incidence rate in person-year using the table and formula below Person-time and disease status among 20 subjects followed for forty years. Use decimal points up to hundredth place Subject Years Contributed Developed Disease? (0 no/1 yes) 25 40 10 15 40 35 10 PHOOOHOOH HOOOOHOHOOH 14 15 16 17 18 40 19 20 15 Number of people at risk in whom a certain illness develops by t Total person-time at risk (T)