What is the meaning of six sigma in statistics?
Six sigma in statistics is a quality control method to produce an error or defect-free data set. Standard deviation is known as Sigma or σ. The more the standard deviation, the less likely that process performs with accuracy and causes a defect. If a process outcome is 99.99966% error-free, it is considered six sigma. A six sigma model works better than 1σ, 2σ, 3σ, 4σ, 5σ processes and is reliable enough to produce defect-free work.
