<meta http-equiv="refresh" content="1; url=/nojavascript/"> Accuracy and Precision ( Study Aids ) | Chemistry | CK-12 Foundation
Dismiss
Skip Navigation

Accuracy and Precision

%
Best Score
Practice Accuracy and Precision
Practice
Best Score
%
Practice Now
Accuracy and Precision
 0  0  0

Feel free to modify and personalize this study guide by clicking “Customize.”

Accuracy and precision are words that we use so much that in day-to-day speech they are freely interchangeable. However, from a scientific perspective, accuracy and precision refer to different things.

License: CC BY-NC 3.0

[Figure1]

Accuracy describes how close a measured experimental value comes to the accepted value.

Precision describes how close data from different trials in an experiment are in relation to each other.

Use the graphic below to help you visualize the differences between the two.

License: CC BY-NC 3.0

[Figure2]

Study Tip!: You may find this following method helpful in remember the difference between the two:

Accuracy begins with an A, so you can remember that accuracy is a measure of how close to the accepted value a measurement is if you think of an "A" letter grade as being the highest accepted value.

Precision begins with a P, and so does the word "Pattern". You can think of measurements which are relatively precise to each other as following a pattern.

.

Why is it valuable to account for how accurate or precise your values are in experimentation?

For help in answering the questions in this guide, refer to this read.

Image Attributions

  1. [1]^ License: CC BY-NC 3.0
  2. [2]^ License: CC BY-NC 3.0

Reviews

Email Verified
Well done! You've successfully verified the email address .
OK
Please wait...
Please wait...
ShareThis Copy and Paste

Original text