Certified Six Sigma Black Belt MCQ Flashcards
7 cards from real Certified Six Sigma Black Belt Exam practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Certified Six Sigma Black Belt MCQ flashcards as text
A Black Belt calculates a p-value of 0.03 for a hypothesis test with α = 0.05. What is the correct conclusion?
Answer: Reject H0 because p < α
Since p = 0.03 < α = 0.05, there is sufficient evidence to reject the null hypothesis.
Which lean concept focuses on producing only what is needed, when it is needed, and in the amount needed?
Answer: Just-In-Time (JIT)
Just-In-Time is a core Toyota Production System principle that minimizes inventory by producing to demand.
When performing a multiple regression analysis, the variance inflation factor (VIF) is used to detect:
Answer: Multicollinearity
VIF measures how much the variance of a regression coefficient is inflated due to multicollinearity among predictors.
In a reliability context, what does MTTF stand for and when is it used?
Answer: Mean Time To Failure — for non-repairable systems
MTTF (Mean Time To Failure) is the average time a non-repairable item operates before failing.
A fishbone (Ishikawa) diagram is MOST useful during which DMAIC phase?
Answer: Analyze
The fishbone diagram is used in the Analyze phase to systematically identify potential root causes of a problem.
Which Six Sigma metric represents the number of defect opportunities per unit?
Answer: DPO
DPO (Defects Per Opportunity) normalizes defect counts by the number of opportunities for defects per unit.
What statistical distribution is used to model the time between failures in a constant-hazard (memoryless) reliability scenario?
Answer: Exponential distribution
The exponential distribution models time between failures when the failure rate is constant, making it memoryless.