Continuous and accuracy in measurements
The continuous nature of measurement means that they cant always be exact and therefore an element of rounding is required.
For example, if the length of a pen is given as 15 cm to the nearest cm, then the length can be anything between 14.5 cm and 15.5 cm.
This can be written as 14.5 cm ≤ pen < 15.5 cm (to 1 d.p.)
Point to note:
- 14.5 cm – this is the lower bound
- 15.5 cm – is this the upper bound