Level of Variable Measurements
von Mahmoud H. Al-Johani
1. Ratio
1.1. There is always an absolute zero that is meaningful
1.2. Example: Weight, Height, age
2. Interval
2.1. The distance between attributes does have meanin
2.2. The interval between values is interpretable
2.3. Example: Range of temperature, age group
3. Nominal
3.1. Categorical variables
3.2. Two categories or more
3.3. Does not imply any order in the responses
3.4. Example: Gender, race, ethnic group, level of education
4. Ordinal
4.1. Attributes can be ordered-ranked
4.2. The interval between values is not interpretable in an ordinal measure
4.3. Example: Pain score, satisfaction level
5. Prepared by: Dr. Weam Banjar for SaudiDent.com
6. --
