Levels of Measurement

• The 3 levels of measurement/ types of data?


  nominal ordinal interval
• Nominal ?


  Each item can only appear in ONE category (discontinuous)
• example of nominal data?


  Voting choice

  blood groups
• Nominal data is what?


  the MOST UNINFORMATIVE type of data
• Nominal is what?


  the 'lowest level of measurement'
• Ordinal data?


  You can numerically rank this data
• Ordinal data- gaps?


  The gap between each data point may be different
• Ordinal examples?


  Finishing places in athletics 1st 2nd 3rd

  • their place tells us which athletes are better than others BUT it does not say how much better 1st place is than 2nd
• Interval?


  it is the 'highest level of measurement'
• INTERVAL?


  Standardised measurement units eg weight, temp
• Interval data has what?


  UNITS

  EG seconds, g, m
• Interval data is what?


  the most informative as the distance between each data point (the interval) is exactly the same
• interval data is always what?


  quantitative