Six Sigma SPC's
Quality Control Dictionary and Glossary
2070 W. Washington St. #5 Springfield IL
62702 Ph: 217.698.0063
6 Sigma Statistical Process Control (SPC) Software for Windows
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.