Identify the levels of measurement for each of the following variables:

x1 _ Annual wage in dollars

x2 _ Industry (1 _ Manufacturing, 2 _ Construction, 0 _ Other)

x3 _ Occupation (1 _ Mgmt., 2 _ Sales, 3 _ Clerical, 4 _ Service, 5 _ Prof.,

0 _ Other)

x4 _ Years of education

x5 _ Southern resident (1 _ Yes, 0 _ No)

x6 _ Non-white (1 _ Yes, 0 _ No)

x7 _ Hispanic (1 _ Yes, 0 _ No)

x8 _ Female (1 _ Yes, 0 _ No)

x9 _ Years of Work Experience

x10 _ Married (1 _ Yes, 0 _ No)

x11 _ Age in years

x12 _ Union member (1 _ Yes, 0 _ No)