Certified Six Sigma Black Belt Exam FREE Certified Six Sigma Black Belt Basic Questions and Answers 3

Question 1

What is the significance of the term 'sigma level' when a process operates at 6 sigma with a 1.5 sigma shift?

Accepted Answer

The process produces 3.4 defects per million opportunities

Answer

The process produces 6.0 defects per million opportunities

Answer

The process produces zero defects

Answer

The process produces 233 defects per million opportunities

Question 2

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

Accepted Answer

Analysis of Variance (ANOVA)

Answer

Two-sample t-test

Answer

Chi-square test

Answer

Paired t-test

Question 3

In a control chart, what condition indicates a process is out of statistical control?

Accepted Answer

A single point beyond the upper or lower control limit

Answer

All points within control limits

Answer

Points randomly distributed around the center line

Answer

Equal number of points above and below the mean

Question 4

What is the main objective of the Control phase in DMAIC?

Accepted Answer

Sustaining improvements and monitoring the process over time

Answer

Identifying the root cause of problems

Answer

Establishing measurement baselines

Answer

Generating potential solutions

Question 5

Which lean tool uses a visual board to limit work-in-progress and improve flow?

Accepted Answer

Kanban

Answer

Value stream mapping

Answer

5S

Answer

Poka-yoke

Question 6

What does the correlation coefficient (r) value of -0.95 indicate about two variables?

Accepted Answer

A strong negative linear relationship

Answer

A weak positive relationship

Answer

No relationship

Answer

A perfect positive relationship