Levels of Measurement

Question 1

Nominal Data

Answer 1

• Category data
  > If using nominal data to summarise exam performance we might simply record whether a student passed or failed their exam.

Question 2

Ordinal data

Answer 2

• Ranked data.
  > When looking at student exam performance instead of recording whether they passed or failed we would go a step further and rank them in terms of who got the highest mark, the second highest mark etc.
  > Adds more meaning to the data
  » Doesn’t tell us what the gaps are between each score

Question 3

Interval data

Answer 3

• Data on a scale.
  > eg. units of time, temperature or scores on a test
  > Scores achieved by each student on the test.
  > Provides more information than ordinal data as we can now see how each person performed in relation to the other students