range chart

How is Sigma Estimated from a Control Chart?

Sigma – an important statistic for us to know. Sigma, or the standard deviation, is a measure of how much dispersion there is in a process. There are numerous ways to estimate sigma. One way, of course, is simply to calculate the value using the formula for the standard deviation:

standard deviation

SPC for Excel

SPC Knowledge Base

subscribe button

Sign up for our FREE monthly publication featuring SPC techniques and other statistical topics.

Customer Stories

Click here to see what our customers say about SPC for Excel!

SPC Around the World

SPC for Excel is used in over 60 countries internationally.  Click here for a list of those countries.

Questions?

Connect with Us