Lean Six Sigma Black Belt Certification FREE Lean Six Sigma Black Belt Certification Assessment Questions and Answers 2 — Questions and Answers
Question 1: Which statistical test is most appropriate for comparing the means of three or more groups in a Lean Six Sigma project?
- Chi-Square Test
- One-Way ANOVA (Correct answer)
- Paired t-Test
- Two-Sample t-Test
Correct answer: One-Way ANOVA
One-Way ANOVA is used to determine whether there are statistically significant differences between the means of three or more independent groups.
Question 2: In a Lean Six Sigma Black Belt project, what does a Cp index of 1.33 indicate?
- The process is not capable
- The process barely meets minimum capability
- The process has good capability with some margin (Correct answer)
- The process is out of control
Correct answer: The process has good capability with some margin
A Cp of 1.33 indicates the process spread fits within the specification limits with adequate margin, representing good capability.
Question 3: What is the primary purpose of a Failure Mode and Effects Analysis (FMEA) in the Analyze phase?
- To calculate process sigma level
- To prioritize potential failure modes by risk (Correct answer)
- To create a value stream map
- To validate measurement system accuracy
Correct answer: To prioritize potential failure modes by risk
FMEA systematically evaluates potential failure modes and ranks them using a Risk Priority Number to prioritize improvement efforts.
Question 4: Which Lean concept focuses on producing only what is needed, when it is needed, in the amount needed?
- Kaizen
- Just-In-Time (Correct answer)
- Poka-Yoke
- Gemba
Correct answer: Just-In-Time
Just-In-Time is the Lean principle of producing and delivering items in the exact quantity needed at the precise time required.
Question 5: What does the Kruskal-Wallis test evaluate in a Black Belt project?
- Correlation between two continuous variables
- Whether sample data comes from a normal distribution
- Differences between medians of three or more independent groups (Correct answer)
- Variance equality across two samples
Correct answer: Differences between medians of three or more independent groups
The Kruskal-Wallis test is a non-parametric alternative to one-way ANOVA that compares medians across three or more independent groups.
Question 6: In Design of Experiments (DOE), what is a confounded effect?
- An effect that cannot be separated from another effect due to the experimental design (Correct answer)
- An effect that has been proven statistically insignificant
- A main effect that exceeds the noise level
- An interaction that is replicated across all runs
Correct answer: An effect that cannot be separated from another effect due to the experimental design
Confounding occurs when the effect of one factor cannot be distinguished from the effect of another factor or interaction due to the design structure.
Lean Six Sigma Black Belt Certification FREE Lean Six Sigma Black Belt Certification Assessment Questions and Answers 2
Which statistical test is most appropriate for comparing the means of three or more groups in a Lean Six Sigma project?