Accuracy and precision - Revision history

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2025-02-18T05:04:16Z

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← Older revision		Revision as of 05:04, 18 February 2025
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	[[Category:Measurement]]		[[Category:Measurement]]
	[[Category:Statistics]]		[[Category:Statistics]]
			== Accuracy and Precision ==
			<gallery>
			File:Accuracy_and_precision.svg\|Accuracy and precision
			File:Accuracy_(trueness_and_precision).svg\|Accuracy (trueness and precision)
			File:High_accuracy_Low_precision.svg\|High accuracy, low precision
			File:High_precision_Low_accuracy.svg\|High precision, low accuracy
			File:ACCvsPrecision.jpg\|Accuracy and Precision
			</gallery>

Prab at 02:52, 17 February 2025

2025-02-17T02:52:47Z

← Older revision		Revision as of 02:52, 17 February 2025
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	=== Accuracy ===		=== Accuracy ===
	~~[[File:Accuracy (trueness and precision).svg\|thumb\|right\|Accuracy as trueness and precision.]]~~
	Accuracy refers to the closeness of a measured value to a standard or known value. In other words, it is the degree to which the result of a measurement conforms to the correct value or a standard. Accuracy is often expressed as a percentage, indicating how close the measurement is to the true value.		Accuracy refers to the closeness of a measured value to a standard or known value. In other words, it is the degree to which the result of a measurement conforms to the correct value or a standard. Accuracy is often expressed as a percentage, indicating how close the measurement is to the true value.

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	== Relationship between Accuracy and Precision ==		== Relationship between Accuracy and Precision ==

	~~[[File:High accuracy Low precision.svg\|thumb\|right\|High accuracy, low precision.]]~~
	[[File:High precision Low accuracy.svg\|thumb\|right\|High precision, low accuracy.]]		[[File:High precision Low accuracy.svg\|thumb\|right\|High precision, low accuracy.]]
	Accuracy and precision are independent of each other. A measurement system can be:		Accuracy and precision are independent of each other. A measurement system can be:

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2025-02-11T21:15:09Z

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= Accuracy and Precision =

[[File:Accuracy and precision.svg|thumb|right|Illustration of accuracy and precision.]]

'''Accuracy and precision''' are two important concepts in the field of [[measurement]] and [[statistics]]. They are often used to describe the quality of a measurement system or the results of a measurement process.

== Definitions ==

=== Accuracy ===
[[File:Accuracy (trueness and precision).svg|thumb|right|Accuracy as trueness and precision.]]
Accuracy refers to the closeness of a measured value to a standard or known value. In other words, it is the degree to which the result of a measurement conforms to the correct value or a standard. Accuracy is often expressed as a percentage, indicating how close the measurement is to the true value.

=== Precision ===
Precision, on the other hand, refers to the closeness of two or more measurements to each other. It is a measure of the repeatability or reproducibility of the measurement process. High precision means that repeated measurements under unchanged conditions show the same results.

== Relationship between Accuracy and Precision ==

[[File:High accuracy Low precision.svg|thumb|right|High accuracy, low precision.]]
[[File:High precision Low accuracy.svg|thumb|right|High precision, low accuracy.]]
Accuracy and precision are independent of each other. A measurement system can be:

* '''High accuracy, low precision''': Measurements are close to the true value but not to each other.
* '''Low accuracy, high precision''': Measurements are close to each other but not to the true value.
* '''High accuracy, high precision''': Measurements are both close to the true value and to each other.
* '''Low accuracy, low precision''': Measurements are neither close to the true value nor to each other.

== Importance in Measurement ==

In scientific research and [[engineering]], both accuracy and precision are crucial for ensuring the reliability and validity of results. Accurate and precise measurements are essential for making informed decisions and for the advancement of knowledge.

== Factors Affecting Accuracy and Precision ==

Several factors can affect the accuracy and precision of measurements, including:

* [[Instrument calibration]]
* [[Environmental conditions]]
* [[Operator skill]]
* [[Measurement technique]]

== Related Pages ==

* [[Measurement uncertainty]]
* [[Error analysis]]
* [[Statistical significance]]
* [[Calibration]]

== Gallery ==

<gallery>
File:ACCvsPrecision.jpg|Comparison of accuracy and precision.
</gallery>

[[Category:Measurement]]
[[Category:Statistics]]