ASQ Six Sigma Black Belt 2

Question 1

In the Measure phase of DMAIC, which metric represents the number of defects per million opportunities?

Accepted Answer

DPMO

Answer

Cpk

Answer

Sigma level

Answer

RTY

Question 2

A process with a Cpk of 1.33 operates at approximately which sigma level?

Accepted Answer

4 sigma

Answer

3 sigma

Answer

5 sigma

Answer

6 sigma

Question 3

Which sampling method ensures every possible sample of a given size has an equal probability of selection?

Accepted Answer

Simple random sampling

Answer

Stratified sampling

Answer

Systematic sampling

Answer

Cluster sampling

Question 4

In a cause-and-effect (Ishikawa) diagram for a manufacturing defect, which of the following is NOT a standard 'bone' category?

Accepted Answer

Market

Answer

Machine

Answer

Method

Answer

Measurement

Question 5

What does the term 'tollgate review' refer to in a Six Sigma project?

Accepted Answer

A formal phase-gate review where leadership approves advancement to the next DMAIC phase

Answer

A customer satisfaction survey conducted at project end

Answer

A statistical test to validate measurement system accuracy

Answer

A lean technique to eliminate non-value-added steps

Question 6

Which statistical tool is used to determine whether two or more population variances are equal?

Accepted Answer

Bartlett's or Levene's test

Answer

t-test

Answer

Chi-square goodness-of-fit test

Answer

Mann-Whitney U test

Question 7

In Design of Experiments (DOE), what is the purpose of 'blocking'?

Accepted Answer

To isolate and control the effect of a known nuisance variable

Answer

To reduce the number of experimental runs required

Answer

To randomize the order of experimental runs

Answer

To replicate key treatment combinations