Texts: Some new cases of illness over about 12 months in a population of 20 persons. Each horizontal line represents one person. Calculate the incidence rate from October 1, 2004, to September 30, 2005. The denominator = the numerator.
Date of death
Persons
N
+
9
Oct. 1, 2004 4 18.3
Apr. 1, 2005
Sept. 30, 2005
184
20.7 0204