Is a binary variable an example of a two-value data type such as yes or no?

• A. Yes
• B. No
• C. Only for ordinal data
• D. Only for nominal data

Answer: (A)

A binary variable is a two-value data type because it can take only two possible values, such as yes/no, true/false, or 0/1. This captures the essential idea: there are exactly two outcomes, making it the simplest form of a two-value data type. While this kind of variable is often treated as nominal with two categories, the defining feature is the two-value nature, not an inherent requirement about order or broader category. The other options miscast the concept by tying binary data exclusively to ordinal or exclusive to nominal data, which isn’t accurate for describing its two-value characteristic.