Precision refers to the closeness of two or more measurements to each other. Using the example above, if you weigh a given substance five times, and get 3. Precision is independent of accuracy. You can be very precise but inaccurate, as described above. The bowman's arrows will not be clustered low precision , but will be accurately distributed around the bullseye.
If all the shots were averaged, the bullseye would be at the center. A student correctly calculates the acceleration due to gravity to be. Precision is a measure of reproducibility.
If multiple trials produce the same result each time with minimal deviation, then the experiment has high precision. This is true even if the results are not true to the theoretical predictions; an experiment can have high precision with low accuracy. In contrast, accuracy is the measure of difference between a calculated value and the true value of a measurement. High accuracy demands that the experimental result be equal to the theoretical result.
An archer hitting a bulls-eye is an example of high accuracy, while an archer hitting the same spot on the bulls-eye three times would be an example of high precision. A student repeatedly calculates the mass of an object to be 49 grams, when the true mass is 52 grams.
A student calculates the acceleration due to gravity to be using three different methods. Accuracy is the measure of difference between a calculated value and the true value of a measurement.
In contrast, precision is a measure of reproducibility. If you've found an issue with this question, please let us know. With the help of the community we can continue to improve our educational resources. If Varsity Tutors takes action in response to an Infringement Notice, it will make a good faith attempt to contact the party that made such content available by means of the most recent email address, if any, provided by such party to Varsity Tutors.
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Possible Answers: Neither accurate nor precise. Accurate, but the precision cannot be determined. Correct answer: Accurate, but not precise. Explanation : This bag is accurate because it provided the correct number of balloons, however, the process is not precise as the results were clearly not repeatable. Report an Error. Possible Answers: It is accurate, but not precise. Correct answer: It is precise, but not accurate. Explanation : Precision measures is how consistently a device records the same answer.
How can Wally describe the accuracy and precision of the first bag he measured? Possible Answers: Accurate, but not precise. There are insufficient data points to draw a conclusion. Explanation : The claim for the mass of the first bag is accurate; the brand says there should be in each bag and there was in the first bag. Not only do we produce analytical and precision balances which measure up to 0.
Please browse our range of precision measurement products here and find out how our door to door UKAS accredited calibration services can give you a piece of mind. Call Email. What is the Difference between Accuracy and Precision Measurements? What is Accuracy? What is Precision?
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