Classify each of the following as nominal, ordinal, interval, or ratio data.
a. The ranking of a company by Fortune 500
b. The number of tickets sold at a movie theater on any given night
c. The identification number on a questionnaire
d. Per capita income
e. The trade balance in dollars
f. Profit/loss in dollars
g. A company's tax identification
h. The Standard & Poor's bond ratings of cities based on the following scales:
Rating Grade
Highest quality ...............AAA
High quality ................. AA
Upper medium quality ............. A
Medium quality ...............BBB
Somewhat speculative ............. BB
Low quality, speculative ............. B
Low grade, default possible ..........CCC
Low grade, partial recovery possible ........ CC
Default, recovery unlikely ............ C