Levels of measurement

Question 1

What is nominal data

Answer 1

• Data into categories and then counting the frequency.

- For example, how many days of the week were rainy and sunny

Question 2

What is ordinal data

Answer 2

• involves ranking data into place order, with rating scales often being used to achieve this
• For example, first, second, and third in an athletics race – it shows which athletes are better than others, but doesn’t tell us about distances between athletes
• It is more informative than nominal data, but still lacks being full informative

Question 3

What is interval/ratio data

Answer 3

-Standardised measurement units like time, weight, and distance are all interval/ratio data and are the most informative and accurate
-Use equal measurement intervals
-Interval and ratio are classed together, as they apply to the same statistical tests
Interval/ratio= is a scale that starts from a MEANINGFUL ZERO