Levels of measurement

Question 1

Nominal data

Answer 1

Where data is categorised without a specific order. It is qualitative and categorial

Question 2

Ordinal data

Answer 2

Data that is presented in rank order but does not specify the size of differences between ranks

Question 3

Interval data

Answer 3

Data measured in fixed units where values are meaningful with equal intervals between values, no true zero point. E.g. temperature.

Question 4

Ratio data

Answer 4

Has all properties of interval data but a true zero point exists e.g. weight, height etc.