Lean Six Sigma Yellow Belt Certification The Analyze Phase 2

Question 1

Which tool is used to visually display the frequency distribution of a continuous variable during the Analyze phase?

Accepted Answer

Histogram

Answer

A histogram displays the frequency distribution of continuous data, helping identify patterns such as skewness or bimodality.

Question 2

A team discovers that 80% of defects come from 20% of the causes. Which principle does this represent?

Accepted Answer

Pareto Principle

Answer

The Pareto Principle (80/20 rule) states that roughly 80% of effects come from 20% of causes, helping teams prioritize root causes.

Question 3

What does a scatter diagram primarily help a team determine during the Analyze phase?

Accepted Answer

The relationship between two variables

Answer

A scatter diagram plots two variables against each other to identify whether a correlation (positive, negative, or none) exists between them.

Question 4

In hypothesis testing, what does a p-value less than 0.05 typically indicate?

Accepted Answer

Reject the null hypothesis

Answer

A p-value below the significance level (commonly 0.05) indicates sufficient evidence to reject the null hypothesis.

Question 5

Which type of data analysis tool would best help identify whether a machine or operator is the dominant source of variation?

Accepted Answer

Stratification analysis

Answer

Stratification separates data by source (e.g., machine, shift, operator) to determine which factor contributes most to variation.

Lean Six Sigma Yellow Belt Certification Practice Test