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The Mean is one of the measures of “central tendency” in a data set. To calculate the mean is to determine sum of a list of numbers and then divide the sum by the number of numbers in the list. Means don’t take process variation into consideration.

For a better understanding of Mean (aka Average) and an overview of Lean Six Sigma, check out our Free Lean Six Sigma Yellow Belt Training, Green Belt Training or Lean Training.

Elisabeth Swan

Elisabeth is a Managing Partner & Executive Advisor at For over 25 years, she's helped leading organizations like Amazon, Charles Schwab and Starwood Hotels & Resorts build problem-solving muscles with Lean Six Sigma to achieve their goals.