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ًًWhat are the differences between Accuracy and Precision?

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Question added by Mohamed Abdel_Hamid Mohamed Salem , مدير عام المعمل المركزى للصرف الصحى و الصناعى , شركة مياه الشرب و الصرف الصحى بمحافظات القناة
Date Posted: 2017/05/02
SACHIN TANAJI WAGH
by SACHIN TANAJI WAGH , Senior Officer Quality Control , Oman Pharmaceutical Products LLC

Accuracy means Difference between observed value and true value.

Precision means difference in results when same thing measured repeatedly.

Hatim Elamin AbdEllatief Abdedaem
by Hatim Elamin AbdEllatief Abdedaem , DIrector of industry adminstration at Gezira state , ministry of finance and economic affairs Gezira state

Accuracy and precision are important concepts, as they relate to any experimental measurement that you would make.

ACCURACY REVIEW

Accuracy refers to the agreement between experimental data and a known value. You can think of it in terms of a bullseye in which the target is hit close to the center, yet the marks in the target aren't necessarily close to each other.

PRECISION REVIEW

Precision refers to how well experimental values agree with each other.

 

If you hit a bullseye precisely, then you are able to hit the same spot on the target each time, even though that spot may be distant from the center.

KEEP IN MIND

Data can be very precise such that each data point is close to the others, yet contain a high degree of experimental error.

Rameez Malik
by Rameez Malik , Internee , Al-Badar Engineering Company

Precision is basically accuracy with upper and lower bounds.

Will Kenyon
by Will Kenyon , Primavera Implementation Consultant/ Account Manager , PMOLink

Simply put, precision is accuracy with repeatability.

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