That type of measurement would be referred to as a qualitative measurement.
It is called prediction of what you think it could be . A guess.
<Novanet> observation, inference!
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Several observations are taken for each measurement to eliminate or decrease the margin of error.
sungs face
The point on the horse is the height measurement taken is the withers.
Cerebrum.
AN OBSERVATION IS INFORMATION GATHERED THROUGH THE USES OF THE SENSES OR WITH AID OF INSTRUMENTS
Measurement
It means you have taken leave of your senses , or crazy.
A error in measurement is when the measurement taken is not actually correct. For instance, you measure a gap as 49 centimetres wide. You cut the plank of wood to fit that measurement. Then discover the wood you have just cut is too wide to neatly fit the gap. There has been an error in the measurement you have taken.
The body was the first tool esed to aid in measure ment. Jonathan McKnight