2.1. What is Data?¶

2.1.2. Nominal¶

• No distance

• No quantities

• Cannot order

• Mode

• Mean

2.1.5. Examples¶

• Colors

• Weather

• Player numbers in football (cannot order, or cannot say that player 8 is better than 11)

2.1.6. Ordinal¶

• Has order

• Has numerical value

2.1.7. Can calculate¶

• Mode - most common value

• Median

2.1.8. Cannot calculate¶

• Distance between things

2.1.9. Examples¶

• Runners at the finish (they have oder, but position doesn't say about the distance)

• Humidity

• Rating system (5 stars movie is better than 4 stars, but there is no information how much better)

2.1.10. Interval¶

• Have order

• Have distance

• Has scale

• Has start

• Has end

• No absolute zero on the scale

• mode

• median

• mean

• minimum

• maximum

2.1.12. Examples¶

• Temperature C or F (zero is just a normal number, not a start or end of a scale)

• pH (pH zero is not a

• Dates

2.1.13. Ratio¶

• Has order, distance

• mode

• median

• mean

• minimum

• maximum

• T-test

2.1.15. Examples¶

• Kelvin temperature

• Wind

• Number of children