Lean Six Sigma Green Belt Certification Lean Six Sigma Green Belt Analyze Phase Tools Questions and Answers 2 — Questions and Answers
Question 1: Which graphical tool displays the relationship between two continuous variables to identify correlation patterns?
- Scatter diagram (Correct answer)
- Pareto chart
- Control chart
- Histogram
Correct answer: Scatter diagram
A scatter diagram plots paired data points to visually reveal the direction and strength of correlation between two variables.
Question 2: What is the primary purpose of a hypothesis test in the Analyze phase?
- To determine if observed differences are statistically significant (Correct answer)
- To create a project charter
- To map the current process flow
- To calculate process capability
Correct answer: To determine if observed differences are statistically significant
Hypothesis testing uses statistical evidence to determine whether observed differences or effects are real or due to random chance.
Question 3: In a chi-square test, what type of data is being analyzed?
- Categorical data (Correct answer)
- Continuous data
- Time-series data
- Ratio data
Correct answer: Categorical data
The chi-square test evaluates whether there is a significant association between two categorical variables.
Question 4: What does a correlation coefficient of -0.92 indicate about two variables?
- Strong negative linear relationship (Correct answer)
- Weak negative linear relationship
- Strong positive linear relationship
- No relationship
Correct answer: Strong negative linear relationship
A correlation coefficient near -1.0 indicates a strong negative linear relationship where one variable increases as the other decreases.
Question 5: Which tool helps identify the vital few causes from the trivial many in defect analysis?
- Pareto chart (Correct answer)
- Box plot
- Run chart
- Affinity diagram
Correct answer: Pareto chart
A Pareto chart applies the 80/20 rule to rank causes by frequency, highlighting the vital few that contribute most to the problem.
Question 6: What is the purpose of a multi-vari chart in the Analyze phase?
- To visualize variation from multiple sources simultaneously (Correct answer)
- To track defects per million opportunities
- To calculate sigma level
- To document process steps
Correct answer: To visualize variation from multiple sources simultaneously
A multi-vari chart displays positional, cyclical, and temporal variation patterns simultaneously to narrow down the dominant source of variation.
Lean Six Sigma Green Belt Certification Lean Six Sigma Green Belt Analyze Phase Tools Questions and Answers 2
Which graphical tool displays the relationship between two continuous variables to identify correlation patterns?