Certified Six Sigma Black Belt Exam Assessment 5

Question 1

A team assessing supplier quality uses an attribute agreement analysis. Three appraisers each inspect 30 parts twice. What is the primary metric reported?

Accepted Answer

Kappa statistic (Cohen's Kappa)

Answer

Cohen's Kappa measures agreement between appraisers (and within appraisers vs. reference) beyond chance in attribute measurement system analysis.

Question 2

During a process assessment, a Black Belt discovers that a key input variable (X) explains 64% of the variation in the output (Y). What is the correlation coefficient (r) between X and Y?

Accepted Answer

0.80

Answer

R-squared = 0.64 means r = √0.64 = 0.80; the correlation coefficient is the square root of the coefficient of determination.

Question 3

A Black Belt is assessing whether the variance of a new process is lower than the variance of the existing process. Which hypothesis test is appropriate?

Accepted Answer

F-test (Levene's or Bartlett's test)

Answer

The F-test (or Levene's/Bartlett's test) is used to compare variances between two populations.

Question 4

In a process assessment, a team identifies 'opportunity' as each solder joint on a circuit board. The board has 200 joints and 8 defects were found across 50 boards. What is the DPMO?

Accepted Answer

800

Answer

DPMO = (Defects / (Units × Opportunities per unit)) × 1,000,000 = (8 / (50 × 200)) × 1,000,000 = 800 DPMO.

Question 5

Which assessment method evaluates the risk of a process failure by examining 'what can go wrong' before the process is implemented?

Accepted Answer

Process FMEA (PFMEA)

Answer

Process FMEA (PFMEA) proactively identifies potential failure modes in a process before implementation and assesses their risk via RPN.

Certified Six Sigma Black Belt Exam Practice Test

Certified Six Sigma Black Belt Exam Practice Test

Certified Six Sigma Black Belt Exam Assessment 5