Employee data. The personnel department keeps records on all employees in a company. Here is the information that they keep in one of their data files: employee identification number, last name, first name, middle initial, department, number of years with the company, salary in dollars per year, education (coded as high school, some college, or college degree), and age in years.

(a) What are the cases for this data set?

(b) Describe each of these items as label, a quantitative variable, or a categorical variable.

(c) Set up a spreadsheet which could be used to record the data. Give appropriate column headings and five sample cases.