Answer: Please refer to Explanation
Explanation:
A Nominal Scale is a scale where variables are grouped and categorized according to certain characteristics. You cannot perform normal mathematical functions on them such as addition, subtraction and the like.
Ordinal Scales are like nominal scale but in this case the variables can be ranked. You can have a first position and a last position.
An Interval scale is numeric and as such can be ordered. You can also perform mathematical functions on them. Interval scales have no true zero and an example is Temperature. That's why temperature can drop to the negatives.
A Ratio Scale is in many ways like an Interval Scale. The main distinguishing factor is that a Ratio Scale has a true 0. This means that at there is no number before 0 and at 0 level, the variable is considered finished.
Classifying the above therefore,
a. Star ratings of hotels.
ORDINAL because they can be ranked.
b. Sales revenues of companies.
RATIO because there is a true 0. At $0, there is no revenue.
c. Grades of officers in armed forces.
ORDINAL as it can be ranked.
d. House numbers in a street.
NOMINAL as the street numbers don't mean a house is higher ranked than another.
e. Prices of cars.
RATIO as there is a true zero. A car at $0 is free. Price cannot be below $0.
f. Classes of accommodation on passenger flights.
ORDINAL as it can be ranked according to treatment in the various classes.
g. Passport numbers.
NOMINAL as the different passport numbers are simply used for identification and cannot rank people.
h. Numbers in a rating scale on a questionnaire.
ORDINAL because the variables can be ranked from top to bottom.
i. Index numbers.
ORDINAL if the index can be ranked.
