Consider the following statements. Which of them are correct?

1.Categorical variables are measured on nominal or ordinal measurement scales

2.Continuous variables are measured on either an interval or a ratio scale

3.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

Explanation

Statements one and two are correct, so categorical variables use nominal or ordinal and continuous use interval or ratio.

Categorical variables are measured on nominal or ordinal scales, confirming statement one.

Continuous variables are measured on interval or ratio scales, confirming statement two.

The claim that both types can use any scale as per the situation is false, so statement three fails.

Nominal and ordinal scales classify or rank without a true zero or equal intervals.

Interval and ratio scales carry equal intervals, and ratio adds a true zero point.

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