For the following statistics, 1) decide whether the statistics is a count, proportion, rate, or ratio; 2) state whether the statistic represents prevalence or incidence. a) Bike - related crashes send 567,000 persons to hospital emergency rooms with injuries every year. b) Before the discovery of tetracycline and chloramphenicol, as many as 30% of patients with meningitis died of the disease. 3 c) Birth defects are the leading causes of infant mortality in the US accounting for 20% of all infant deaths. d) Prostate cancer is the most common cancer in American men. The American Cancer Society estimate during 2001 approximately 66 new cases of prostate cancer per 100,000 population will be diagnosed in the US. e) The risk for death was 20% in the untreated group and 10% in the treated group. f) Among men who eat a low -crab diet, diabetes develops in 1% within five years. g) In parts of southern Africa, 20% of women of child - bearing age are infected with HIV. h) In a cohort of men engaging in high risk behavior for HIV, the rate of new infections was 3 per 100 person-years of observation