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

Question 1

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

Accepted Answer

One-Way ANOVA

Answer

Chi-Square Test

Answer

Two-Sample t-Test

Answer

Mann-Whitney U Test

Question 2

In a DMAIC project, what is the primary purpose of the Control phase?

Accepted Answer

Sustain the gains achieved during Improve

Answer

Identify the root cause of defects

Answer

Implement the improved process

Answer

Collect baseline data on the current process

Question 3

What does a Cp value of 1.33 indicate about a process?

Accepted Answer

The process is capable with adequate margin

Answer

The process is not capable of meeting specifications

Answer

The process is marginally capable

Answer

The process has excessive variation

Question 4

Which tool is used to prioritize potential failure modes based on severity, occurrence, and detection ratings?

Accepted Answer

Failure Mode and Effects Analysis

Answer

Pareto Chart

Answer

Control Chart

Answer

Cause-and-Effect Diagram

Question 5

What is the purpose of a Gage R&R study in the Measure phase?

Accepted Answer

To assess measurement system variation

Answer

To validate the improvement solution

Answer

To determine process capability

Answer

To identify critical-to-quality characteristics

Question 6

In hypothesis testing, what does a Type II error represent?

Accepted Answer

Failing to reject a false null hypothesis

Answer

Rejecting a true null hypothesis

Answer

Accepting the alternative hypothesis correctly

Answer

Rejecting the alternative hypothesis correctly