Uncertainty in Measurement:
❖ Measurements consist of 2 parts:
➢ A number
➢ And a unit
❖ What does it tell us? It tells us something about the quality of the
measurement
❖ Error: the difference between a measured value and the ‘true value’
❖ Uncertainty: quantifiable doubt about the measurement
Quantifying uncertainty
● Average (arithmetic mean): As a rule of thumb, a measurement should be
measured between 4-10 times [heighth]
● Spread (standard deviation): a measure of how far each of your individual
(4-10) datapoints is removed from the average [spread]
