IASSC Certified Lean Six Sigma Yellow Belt (ICYB) — Question 7

Six Sigma refers to a process whose output has 100% of its data points within 8 Standard Deviations from the Mean.

Answer options

• A. True
• B. False

Correct answer: A

Explanation

The correct answer is True because Six Sigma aims for a level of quality where the output is expected to be within 6 standard deviations from the mean, which corresponds to a very low probability of defects. Therefore, stating that all data points are within 8 standard deviations is indeed true, as it encompasses the Six Sigma level and provides a wider margin of error.