Define interval.
1. The quantity between readings.
2. Repeated by another person, or by using different equipment or techniques, and the same results are obtained.
3. A statement suggesting what will happen in the future, based on observation, experience or a hypothesis.
4. This is the smallest change in the quantity being measured (input) of a measuring instrument that gives a perceptible change in the reading.
5. A range of values or numbers between two given endpoints or values, typically used in mathematics or statistics.
The correct definition of "interval" in the given context is:
4. This is the smallest change in the quantity being measured (input) of a measuring instrument that gives a perceptible change in the reading.