How is Standard Deviation and Relative Standard Deviation Calculated?

Document ID

Document ID TE6453

Published Date

Published Date 05/27/2017
Print
Question
How is Standard Deviation and Relative Standard Deviation Calculated?
Summary
Calculations of standard deviation
Answer
Standard deviation is a calculation of precision.
Precision measures how well the test results can be reproduced. A series of measurements on the same sample for the same parameter are compared to the average measurement. Remember that it is possible to produce test results with high precision but low accuracy. The most commonly used estimates of precision are the standard deviation (SD) and the relative standard deviation (RSD). RSD also is known as the coefficient of variation (CV).

By definition standard deviation is a quantity calculated to indicate the extent of deviation for a group as a whole.

Please see the attached article for a full calculation series with examples of calculations.
Attachments

Was this answer helpful?

Submitting...
Thank you for your feedback!
There was an error with your submission. Please try again.