A unit. You can't say a piece of wood is 6. It can be 6 millimeters, 6 centimeters, 6 meters or 6 inches or 6 ft. Without a unit a measurement is meaningless. A certain amount of accuracy is also useful.
measurement value (magnitude of the quantity) and a proper unit.
You cannot convert from linear measurement (feet) to area measurement (acres) in any meaningful way.
Intrevals have no absolute value in research statictis.
The unit of measurement
In units of measure(:
The value of the measurement and the units used.
length
Ratio - because there is a meaningful zero and an equal distance between points.
scare a bunch of little kids
It must be the unit of the measurement that you are converting FROM.
The length of the boat.
a number and a unit