Identify the following as nominal level, ordinal level, interval level, or ratio level data.

1. Religions
2. Ice cream flavor preference
3. Students classified by their reading ability: Above average, Below average, Normal
4. Years of important historical events
5. A meteorologist compiles a list of temperatures in degrees Celsius for the month of May.
6. Instructors classified as: Easy, Difficult or Impossible
7. Amount of money in savings accounts
8. Ages (in years) of art students
9. Flavors of frozen yogurt
10. The teacher of a class of third graders records the percentage that each student got correct on the last science test.
11. The teacher of a class of third graders records the letter grade for mathematics for each student.
12. The teacher of a class of third graders records the height of each student.
13. The teacher of a class of third graders records the eye color of each student.
14. Commuting times to work
15. Letter grades on an English essay
    

SCALES OF MEASUREMENT Nominal Data are labels or names used to identify an attribute of the element. A nonnumeric label or numeric code may be used.\fSCALES OF MEASUREMENT Interval The data have the properties of ordinal data, and the interval between observations is expressed in terms of a fixed unit of measure. Interval data are always numeric.SCALES OF MEASUREMENT Ratio The data have all the properties of interval data and the ratio of two values is meaningful. Variables such as distance, height, weight, and time use the ratio scale. This scale must contain a zero value that indicates that nothing exists for the variable at the zero point