Certified Six Sigma Black Belt Exam Free Certified Six Sigma Black Belt Practice Questions and Answers 2

Question 1

A Black Belt discovers that a critical process metric follows a non-normal distribution. Which tool is most appropriate for determining process capability?

Accepted Answer

Non-normal capability analysis using Weibull or other fitted distribution

Answer

When data is non-normal, fitting an appropriate distribution such as Weibull allows accurate capability analysis without forcing normality assumptions.

Question 2

During the Analyze phase, a team identifies multiple potential root causes. Which technique best helps prioritize these causes based on both probability and impact?

Accepted Answer

Failure Mode and Effects Analysis (FMEA)

Answer

FMEA systematically evaluates each potential failure mode by severity, occurrence, and detection to produce a Risk Priority Number for prioritization.

Question 3

What is the primary purpose of a Gage R&R study in a Six Sigma project?

Accepted Answer

To assess the variation contributed by the measurement system relative to total process variation

Answer

Gage R&R quantifies how much of the observed process variation is attributable to the measurement system, including both repeatability and reproducibility components.

Question 4

A Black Belt is designing an experiment with 5 factors, each at 2 levels, but resources allow only 8 runs. Which design is most appropriate?

Accepted Answer

2^(5-2) fractional factorial design

Answer

A 2^(5-2) fractional factorial design reduces the full 32-run experiment to 8 runs while still estimating main effects, though some interactions will be confounded.

Question 5

In a hypothesis test comparing two population means, a Black Belt obtains a p-value of 0.03 with alpha set at 0.05. The practical significance is negligible. What should the Black Belt conclude?

Accepted Answer

Report statistical significance but recommend no action due to lack of practical significance

Answer

Statistical significance alone does not justify action; a Black Belt must also evaluate whether the difference is large enough to matter practically before recommending changes.

Certified Six Sigma Black Belt Exam Practice Test

Certified Six Sigma Black Belt Exam Practice Test

Certified Six Sigma Black Belt Exam Free Certified Six Sigma Black Belt Practice Questions and Answers 2