Data

• What is nominal data?

  Nominal data is the most basic type of data, represented in tallies or frequencies in categories.
• What does nominal data tell us?

  It tells us how many people are in each category.
• What is ordinal data?

  Ordinal data is rank order data that cannot tell us the size of the difference between ranks.
• Why can't ordinal data tell us the size of the difference between ranks?

  Because it is based on opinion and does not have units.
• What is an example of ordinal data?

  An example of ordinal data is ranking pain or happiness.
• What is interval data?

  Interval data is a complex level of measurement with equal gaps between each unit of measurement.
• What are examples of interval data?

  Examples of interval data include centimeters, meters, and temperature.
• What is ratio data?

  Ratio data is the best type of data, similar to interval data but with a true zero.
• What distinguishes ratio data from interval data?


  Ratio data has a true zero, while interval data does not.
• Why does ratio data not include temperature?

  Because the temperature scale does not have a true zero.