A headhunter company collected information on a group of job hunters. The first six applicants’ data appear below. The columns correspond to the job hunter’s name, gender, age, position applied to, earliest date of joining, and salary expectation (in U.S. dollars).

a) What does a row correspond to in this data table? How would you best describe its role: as a participant, subject, case, respondent, experimental unit, or something else?

b) How many variables are measured in each row?