Activity #4: Determine which of the four levels of measurement (nominal, ordinal, interval, ratio) is the most appropriate for classifying each set of data.
1. annual income of teachers
2. final grades in mathematics
3. colors of T-shirts for the season
4. social security number
5. ratings of very superior, superior, above average, average, below average, or poor for the projects submitted
6. lead contents of candies
7. gender of students in math class
8. body temperature of angry taxpayers
9. cars described as compact or full-size
10. weights of plastics discarded by households
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Verified answer
1. Ratio (can be measured and compared using a true zero point)
2. Ordinal (can be ranked but the differences between the grades may not be the same)
3. Nominal (just categorical data without any inherent order)
4. Nominal (just a unique identifier without any inherent order)
5. Ordinal (can be ranked but the differences between the ratings may not be the same)
6. Ratio (can be measured and compared using a true zero point)
7. Nominal (just categorical data without any inherent order)
8. Interval (can be measured and compared but has no true zero point)
9. Nominal (just categorical data without any inherent order)
10. Ratio (can be measured and compared using a true zero point)