Lean Six Sigma Yellow Belt Certification Lean Six Sigma Yellow Belt The Analyze Phase Questions and Answers 2

Question 1

Which graphical tool is used in the Analyze phase to display the relationship between two continuous variables?

Accepted Answer

Scatter diagram

Answer

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?

Accepted Answer

To determine if observed differences are statistically significant

Answer

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?

Accepted Answer

Categories of potential causes

Answer

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?

Accepted Answer

The result is statistically significant and the null hypothesis should be rejected

Answer

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?

Accepted Answer

5 Whys

Answer

The 5 Whys technique involves iteratively asking why a problem occurs until the root cause is uncovered.

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