Questions:
1. There are 10,000 individuals in City A, which is located in Massachusetts. Eight young individuals and 420 old individuals develop the flu over the course of a year.
• Use these data to calculate the crude influenza rate per 1,000 individuals per years in City A.
• What is the crude rate of influenza in City B?
• What is the crude rate of influenza in City C?
• Calculate an age-adjusted influenza rate for each of the cities. Use the age distribution for the State of Massachusetts (shown in the table) as the standard