Lean Six Sigma Yellow Belt Certification Lean Six Sigma Yellow Belt The Analyze Phase Questions and Answers 2 — Questions and Answers
Question 1: Which graphical tool is used in the Analyze phase to display the relationship between two continuous variables?
- Scatter diagram (Correct answer)
- Pareto chart
- Histogram
- Control chart
Correct answer: Scatter diagram
A scatter diagram plots paired data points to reveal correlation or relationships between two continuous variables.
Question 2: What is the primary purpose of a hypothesis test during the Analyze phase?
- To determine if observed differences are statistically significant (Correct answer)
- To collect baseline data for the project
- To define the project scope
- To implement process improvements
Correct answer: To determine if observed differences are statistically significant
Hypothesis testing uses statistical methods to determine whether observed differences in data are due to real effects or random chance.
Question 3: In a cause-and-effect diagram, what do the 'bones' branching off the main spine represent?
- Categories of potential causes (Correct answer)
- Steps in the process flow
- Customer requirements
- Measurement data points
Correct answer: Categories of potential causes
The bones of a fishbone diagram represent major categories such as Man, Machine, Method, Material, Measurement, and Environment.
Question 4: What does a p-value less than 0.05 typically indicate in the Analyze phase?
- The result is statistically significant and the null hypothesis should be rejected (Correct answer)
- The process is in statistical control
- The sample size is too small
- The data follows a normal distribution
Correct answer: The result is statistically significant and the null hypothesis should be rejected
A p-value below 0.05 means there is less than a 5% probability the result occurred by chance, leading to rejection of the null hypothesis.
Question 5: Which technique involves asking 'why' repeatedly to drill down to the fundamental cause of a problem?
- 5 Whys (Correct answer)
- FMEA
- Benchmarking
- Voice of the Customer
Correct answer: 5 Whys
The 5 Whys technique involves iteratively asking why a problem occurs until the root cause is uncovered.
Question 6: What is the purpose of a multi-vari chart in the Analyze phase?
- To identify the largest source of variation among multiple factors (Correct answer)
- To track defects per million opportunities
- To map the entire value stream
- To calculate process capability indices
Correct answer: To identify the largest source of variation among multiple factors
A multi-vari chart displays variation from multiple sources simultaneously to help identify which factor contributes most to process variation.
Lean Six Sigma Yellow Belt Certification Lean Six Sigma Yellow Belt The Analyze Phase Questions and Answers 2
Which graphical tool is used in the Analyze phase to display the relationship between two continuous variables?