Statistics - (Interval|Delta) (Measurement)

About

An interval (measurement|variable) gives:

• distance (a range) between two values
• and order (rank) between this distances

Articles Related

Properties

The following properties applied to interval measurement:

• The interval between each unit are equals (temperature between 21 and 22 degree is the same than between 22 and 23 degree)
• There is no absolute (true zero) when interval are scaled.

Example

• longitude and latitude
• temperature (either Celsius or Fahrenheit degrees). A change of 1C is the same if the temperature goes from 0 C to 1 C, as it is when the temperature goes from 40C to 41C.
• time,
• distance,
• area
• volume

Documentation / Reference

• Unified Modeling Language (UML) - 2.5.1 - Chapter 8.5