Paper 1 · Research Aptitude
Consider the following statements. Which of them are correct?
- Categorical variables are measured on nominal or ordinal measurement scales
- Continuous variables are measured on either an interval or a ratio scale
- Both categorical and continuous variables can be measured against any scale as per the situation
AOnly 1 and 2 ✓ Correct
BOnly 2 and 3
COnly 1 and 3
DAll of the above
Correct answer: (A) Only 1 and 2 — Statements 1 and 2 are correct, so that is the answer.
Explanation
★Statements 1 and 2 are correct, so that is the answer.
★Categorical variables sort cases into groups, so they are measured on nominal or ordinal scales.
★Continuous variables are measured in numbers with meaningful gaps, so they use interval or ratio scales.
★So each type of variable belongs to its own kind of measurement scale.
★The claim that both types can be measured against any scale as per the situation is false.
★So only the first two statements are correct.
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