I hate school because of all stupid textbooks, like my padded grammar book last quarter, or my environmentalgeographywhateverhatethisclass book now:
"Another important measure of the health status of a population is the mortality rate, which is the ratio of the number of deaths during a specified period to the number of persons at risk of dying during a specific period."
Uhhh.... so the like the population, minus Spike and other immortals? Seriously Mr. Author, stop wasting my time. I know you get paid by the word and all, but that extra 18 cents won't make up for the beating you're going to get if I meet you in person.