Please help!! (Stats)

Measures of Disease Occurrence (adapted from Lab Manual-Public Health 5330, Division of Epidemiology, University of Minnesota) This is a fictional case that has the purpose of familiarizing the students with the concept of population at risk, the estimation of incidence, prevalence, and case fatality rates. Case: A hypothetical cohort included 500 persons at the beginning of the observation period on August 22. At that time, all 500 subjects in the cohort were at risk of developing disease X. During the time period from August 22 to October 12, a total of 23 cases of disease X occurred in this cohort. The time of onset, length of illness, outcome (recovery or death) of each of the 23 cases of this disease are shown in the diagram on the next page. The last case occurred on October 3rd. All sick persons who later recovered can never get the disease again (no longer at risk). There were no losses to follow-up during the period of interest (August 22 - October 12). A star means the person has died. 11. Calculate the incidence (AKA the incidence proportion, incidence risk, cumulative incidence) per 1,000 for the period of time from August 22 to October 12. |12. (a) Calculate the incidence (AKA the incidence proportion/cumulative incidence) per 1,000 for the month of September.Measures of Disease Occurrence (adapted from Lab Manual-Public Health 5330, Division of Epidemiology, University of Minnesota) This is a fictional case that has the purpose of familiarizing the students with the concept of population at risk, the estimation of incidence, prevalence, and case fatality rates. Case: A hypothetical cohort included 500 persons at the beginning of the observation period on August 22. At that time, all 500 subjects in the cohort were at risk of developing disease X. During the time period from August 22 to October 12, a total of 23 cases of disease X occurred in this cohort. The time of onset, length of illness, outcome (recovery or death) of each of the 23 cases of this disease are shown in the diagram on the next page. The last case occurred on October 3rd. All sick persons who later recovered can never get the disease again (no longer at risk). There were no losses to follow-up during the period of interest (August 22 - October 12). A star means the person has died. 11. Calculate the incidence (AKA the incidence proportion, incidence risk, cumulative incidence) per 1,000 for the period of time from August 22 to October 12. |12. (a) Calculate the incidence (AKA the incidence proportion/cumulative incidence) per 1,000 for the month of September