• February 16, 2022

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• PHY101 Physics I © Dr.Cem Özdoğan

• 1-8 Accuracy, Precision

• Accuracy is how close a measurement is to the correct value for that measurement.
• Exact/Correct value: 11.0
• Measurements: 11.1, 11.2, and 10.9. These measurements are quite accurate because they are very close to the correct value of 11.0.
• The precision of a measurement system is refers to how close the agreement is between repeated measurements (which are repeated under the same conditions).

• Low precision.

• High precision.

• Uncertainty: A ± δA
• Percent Uncertainity: % unc = δA/A ×100%

High accuracy.

Low accuracy.

3 significant figures (sf)