The U.S. Census Bureau collects information about the ages of people in the United States. Results are published in Current Population Reports.
a. Identify the variable and population under consideration.
b. A sample of six U.S. residents yielded the following data on ages (in years). Determine the mean and median of these age data. Decide whether those descriptive measures are parameters or statistics, and use statistical notation to express the results.
29 54 9 45 51 7
c. By consulting the most recent census data, we found that the mean age and median age of all U.S. residents are 35.8 years and 35.3 years, respectively. Decide whether those descriptive measures are parameters or statistics, and use statistical notation to express the results.