C1. Explain which of the following is a statistic and which is a parameter.

1. The mean age of Americans from the 2020 decennial census 2. The unemployment rate for the population of U.S. adults, estimated by the government from a large sample 3. The percentage of students at your school who receive an athletic scholarship 4. The percentage of Arizonans opposed to increasing border control from a poll of 1,000 residents 5. The mean salaries of employees at your school (e.g., administrators, faculty, maintenance)