Lean Six Sigma Green Belt Certification FREE LSSGB Questions and Answers 2 — Questions and Answers
Question 1: Which phase of DMAIC focuses on identifying the root cause of a process problem?
- Define
- Measure
- Analyze (Correct answer)
- Improve
Correct answer: Analyze
The Analyze phase uses data analysis and statistical tools to identify and verify the root causes of process defects.
Question 2: What does a process capability index (Cpk) of 1.33 indicate?
- The process is not capable
- The process barely meets specifications
- The process is capable with adequate margin (Correct answer)
- The process has excessive variation
Correct answer: The process is capable with adequate margin
A Cpk of 1.33 indicates the process is capable and has sufficient margin between the process spread and specification limits.
Question 3: In a cause-and-effect diagram, which category is NOT one of the traditional 6 Ms?
- Manpower
- Methods
- Money (Correct answer)
- Machines
Correct answer: Money
The traditional 6 Ms are Manpower, Methods, Machines, Materials, Measurements, and Mother Nature — Money is not included.
Question 4: What is the primary purpose of a SIPOC diagram in Lean Six Sigma?
- To calculate process sigma level
- To provide a high-level overview of a process (Correct answer)
- To track defects per million opportunities
- To determine staffing requirements
Correct answer: To provide a high-level overview of a process
A SIPOC diagram maps Suppliers, Inputs, Process, Outputs, and Customers to give stakeholders a high-level view of the process scope.
Question 5: Which statistical test would you use to compare the means of two independent groups?
- Chi-square test
- Paired t-test
- Two-sample t-test (Correct answer)
- ANOVA
Correct answer: Two-sample t-test
A two-sample t-test compares the means of two independent groups to determine if there is a statistically significant difference.
Question 6: What is the significance of a p-value less than 0.05 in hypothesis testing?
- The null hypothesis is proven true
- There is insufficient evidence to reject the null hypothesis
- There is statistically significant evidence to reject the null hypothesis (Correct answer)
- The sample size is too small
Correct answer: There is statistically significant evidence to reject the null hypothesis
A p-value below 0.05 means there is less than a 5% probability the observed result occurred by chance, providing evidence to reject the null hypothesis.
Lean Six Sigma Green Belt Certification FREE LSSGB Questions and Answers 2
Which phase of DMAIC focuses on identifying the root cause of a process problem?