Confidence Interval
Six Sigma
Confidence Interval
Range of plausible values for a population parameter at a stated confidence level.
Examples
- 01The Green Belt reports average cycle time as 42 seconds with a 95 % confidence interval of 40.5 to 43.5 seconds.
- 02In the Analyze phase, the confidence interval of the difference between two suppliers includes zero, so no real difference is proven.
- 03The tollgate review shows the confidence interval of the improvement, so management sees the range of likely savings, not one number.