Uncertainty in Measurement

Measurements are made in scientific laboratories, and are commonly used in scientific calculations. To carry out scientific calculations properly it is important to discuss the following concepts;

• Accuracy
  • refers to the agreement of a particular value with the true value.
• Precision
  • refers to the degree of agreement among several measurements of the same quantity.
  • Sample animation differentiating between accuracy and precision.
• Exact numbers
  • those numbers that we know exactly. Counting objects is an experiment that can be carried out with complete accuracy.
• Uncertainty
• Significant figures