Amanda is currently in the market for a new job as a mechanical engineer. To get a sense of what the typical salary is for the position she is interested in, Amanda did some research and found a database showing salary information from mechanical engineers across the county. Amanda had access to both the average national salary and the average local salary for mechanical engineers. Which of the following is an example of a parameter in Amanda's scenario? a. The average salary for a mechanical engineer in Amanda's city.
b. All of the mechanical engineers in the country.
c. Mechanical engineers in Amanda's city.
d. The national average salary for mechanical engineers.