Unit+7+-+Units+of+Measure+and+Applications

Accuracy in Measurement
It is important to realise that measurements are never exact, they are simply an approximation. Some of the reasons for this inaccuracy include:
 * A measurement can always be more exact. For example, a measurement of 1.64m is more exact than 1.6m, but is less exact that 1.643m.
 * Measurements may not be made or observed carefully. Human error can occur.
 * The measuring device may be faulty.

Error in measurement is the difference between the measured value and the true valuOne method that is commonly used to minimise error is to take a number of measurements and find their average. To do this you smply add up all the measurements taken and divide by the numbe of times you repeated the measurement.