Certified Six Sigma Black Belt Exam Basic 3

Question 1

Which tool is used in the 'Define' phase to capture the voice of the customer and link it to critical quality characteristics?

Accepted Answer

Quality Function Deployment (QFD)

Answer

QFD (the House of Quality) translates customer needs (VOC) into measurable technical requirements and critical-to-quality characteristics.

Question 2

In a hypothesis test, Type II error (β) occurs when:

Accepted Answer

A false null hypothesis is failed to be rejected

Answer

A Type II error is failing to reject a null hypothesis that is actually false — also called a 'false negative' or missing a real effect.

Question 3

What does an Ishikawa (fishbone) diagram help identify?

Accepted Answer

Potential causes contributing to a specific effect or problem

Answer

An Ishikawa diagram organizes potential causes (often grouped as 6Ms) to systematically identify root causes of a problem.

Question 4

Gauge Repeatability and Reproducibility (GR&R) studies evaluate:

Accepted Answer

The capability of a measurement system to produce consistent results

Answer

A GR&R study quantifies measurement system variation from repeatability (same operator, same gauge) and reproducibility (different operators) to assess whether the measurement system is adequate.

Question 5

Which statistical test is appropriate for comparing the means of three or more independent groups?

Accepted Answer

One-way ANOVA

Answer

One-way ANOVA (Analysis of Variance) tests whether the means of three or more independent groups are statistically equal.

Certified Six Sigma Black Belt Exam Practice Test

Certified Six Sigma Black Belt Exam Practice Test

Certified Six Sigma Black Belt Exam Basic 3