Q1: State why a histogram is used. This histogram matches samples taken with positive diagnosis for covid 19. Explain briefly what this histogram tells us and one limitation. (300 words)
Q2: Explain what incidence is and how it differs from prevalence. Use the incidence rate for Covid 19 in the West Midlands below as a part of your answer to explain why Public Health England has used incidence rates and one limitation. (400 words)
Q3: What is a risk ratio? Use this table to explain what the risk ratio of 4.2 tells us. The data is from people who have had bowel surgery. (300 words)
