Identify the scale(s) of measurement which would allow ranking of observations. Choose the correct answer from the options given below.

1.Nominal scale

2.Ordinal scale

3.Interval scale

4.Ratio scale

A1, 2 and 3 only

B2, 3 and 4 only ✓ Correct

C2 only

D1 and 2 only

Correct answer: (B) 2, 3 and 4 only

Explanation

Ordinal, interval and ratio scales all allow observations to be ranked, so statements 2, 3 and 4 are correct.

The ordinal scale orders categories but with unequal or unknown gaps.

The interval scale ranks and has equal units yet lacks a true zero.

The ratio scale ranks, has equal units and a true zero, allowing ratios.

The nominal scale only labels categories and carries no order.

Level of measurement rises from nominal through ordinal and interval to ratio.

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