1. For the following statistics, indicate whether the statistic is a count, proportion or rate , and state whether the statistic represents

1.    For the following statistics, 

           indicate whether the statistic is a count, proportion or rate, and

          state whether the statistic represents prevalence, cumulative incidence, incidence rate, or another type of vital statistic (include the specific name), or no vital statistic

a.   There were 4 women with new cases of influenza per 100 person-years of follow-up. 

b.    Approximately 20% of inner-city elementary school children have asthma. 

c.    Bike-related crashes send 567,000 persons with injuries to hospital emergency rooms every year.