Lean Six Sigma Black Belt Certification FREE Lean Six Sigma Black Belt Certification Questions and Answers 2

Question 1

Which statistical test is most appropriate for comparing the means of three or more groups in a Lean Six Sigma project?

Accepted Answer

ANOVA

Answer

Chi-Square Test

Answer

Paired t-test

Answer

Mann-Whitney U Test

Question 2

In a control chart, what does a point beyond the Upper Control Limit (UCL) indicate?

Accepted Answer

A special cause of variation is present

Answer

The process is operating at peak efficiency

Answer

The control limits need to be recalculated

Answer

Normal random variation occurred

Question 3

What is the primary purpose of a Failure Modes and Effects Analysis (FMEA) in a Black Belt project?

Accepted Answer

To prioritize risks based on severity, occurrence, and detection

Answer

To calculate process sigma level

Answer

To map the current state value stream

Answer

To validate measurement system accuracy

Question 4

A Black Belt discovers that a critical X variable has a non-normal distribution. Which approach should be used to establish process capability?

Accepted Answer

Use a Box-Cox transformation or non-normal capability analysis

Answer

Force-fit the data to a normal curve and use Cp/Cpk

Answer

Ignore the distribution and report defects per million only

Answer

Increase sample size until the data appears normal

Question 5

During the Improve phase, a Black Belt uses a 2^4 full factorial Design of Experiments. How many experimental runs are required without replication?

Accepted Answer

16

Answer

8

Answer

12

Answer

24

Question 6

What distinguishes a Lean Six Sigma Black Belt role from a Green Belt role in project execution?

Accepted Answer

Black Belts lead complex cross-functional projects and mentor Green Belts

Answer

Black Belts only work on manufacturing projects

Answer

Green Belts have more statistical training than Black Belts

Answer

Black Belts are not involved in the Define phase