Ribbon bar. Select the Statistics tab. In the Tools group, click Calculators and on the menu, select Six Sigma Calculator to display the Six Sigma Calculator.

Classic menus. On the Statistics - Probability Calculator submenu, select Six Sigma Calculator to display the Six Sigma Calculator.

The Six Sigma Calculator is an extension or special case of the Probability Calculator for the normal distribution; instead of the normal distribution z and p, the Six Sigma Calculator expects as input either Sigma or DPMO (defects per million opportunities), and will compute each quantity from the other.

See also, "Six Sigma" Methodology and STATISTICA.