Certified Six Sigma Black Belt Exam Free Certified Six Sigma Black Belt MCQ Questions and Answers 2

Question 1

Which statistical test is most appropriate for comparing the means of three or more groups in a Six Sigma project?

Accepted Answer

One-way ANOVA

Answer

Chi-square test

Answer

Paired t-test

Answer

Mann-Whitney U test

Question 2

In a cause-and-effect matrix, what does the correlation score represent?

Accepted Answer

The strength of the relationship between process inputs and key outputs

Answer

The financial impact of each input

Answer

The frequency of defects caused by each input

Answer

The statistical significance of each variable

Question 3

What is the primary purpose of a Measurement System Analysis (MSA)?

Accepted Answer

To quantify the amount of variation contributed by the measurement system

Answer

To calibrate all measurement instruments

Answer

To establish control limits for process monitoring

Answer

To validate that products meet customer specifications

Question 4

A Black Belt discovers that residuals in a regression model show a funnel-shaped pattern when plotted against fitted values. What assumption is violated?

Accepted Answer

Constant variance (homoscedasticity)

Answer

Normality of residuals

Answer

Independence of residuals

Answer

Linearity of the relationship

Question 5

Which Lean tool uses a visual board with columns representing workflow stages to limit work-in-progress?

Accepted Answer

Kanban

Answer

Value Stream Map

Answer

5S

Answer

Poka-yoke

Question 6

What does a Cpk value of 1.33 indicate about a process?

Accepted Answer

The process is capable with an acceptable safety margin against specification limits

Answer

The process is not capable of meeting specifications

Answer

The process is marginally capable with minimal safety margin

Answer

The process is operating at Six Sigma quality levels