Pleаse lооk аt the tаble belоw for the questions. Each question has its individual points. The following table shows a 2X2 table data from an epidemiological study. Exposure Status Disease Status Person-years at risk Present (Yes, exposed) 700 1950 Absent (No, not exposed) 300 2250 (Same figure as above) 1. What type of study was this most likely to be? (2 points) 2. What is the incidence rate among those who are exposed to the factor under study? (3 points) 3. What is the incidence rate among those who are not exposed to the factor under study? (3 points) 4. What is the rate difference? (2 points)