Dealing with data; the practical use of numerical information--(12) Rates, ratios and proportions.
D000818:Animals; D002353:Carrier State / Q000453:epidemiology / Q000662:veterinary; D002417:Cattle; D002418:Cattle Diseases / Q000453:epidemiology; D012481:Salmonella Infections, Animal / Q000453:epidemiology; D013223:Statistics as Topic