Six Sigma SPC OEM Products
Six Sigma and SPC (Statistical Process Control) Software
Applications
Six Sigma SPC - 2070 W. Washington St. #5
Springfield IL 62702 Ph: 217.698.0063
6 Sigma Statistical Process Control (SPC) Software for Windows
95/98/NT/2000/XP/ME

Tool based on hypotheses
testing that incorporates a table of calculated probabilities,
(i.e., tail areas under a bell shaped curve), based on a normal distribution
using the probability and degrees of freedom. Table is used to pinpoint an
expected probability for the preferred confidence level for determining or
comparing groups of test data.

The hypotheses is the standard
deviation, (sigma), of a normal population is equal to a
specific value of a standard or reference sigma value; center line.