Answer: (D) Duration of sleep (In hours)
Step-by-step explanation:
The duration of the sleep are not include in the interval scale measurement process. As, the interval scale measurement is the process of measuring the quantitative measurement.
The term interval is the easy to remember as it basically define the main objective of the scale between any two variables in the system. There are basically 4 types of scale measurement that are:
- Interval
- Ratio
- Ordinal
- Nominal