Six Sigma Six Sigma Certifications CLSSBB Questions & Answers

• Question 1:

  Which of the following is the best technique for improving the precision of a designed experiment when the experimental material is NOT homogeneous?

  A. Blocking

  B. Confounding

  C. Randomization

  D. Fractionalizing

  Correct Answer: A

• Question 2:

  Compared to a two-level factorial experiment, which of the following is an advantage of an experiment in three levels?

  A. Interaction effects can be estimated

  B. Curvature can be characterized

  C. The design can be augmented

  D. Efficiency is maximized in the experimental effort

  Correct Answer: B

• Question 3:

  Which of the following is NOT an advantage of using a median?

  A. Extreme values do not affect the median as strongly as they affect Mean

  B. A median can be calculated for qualitative descriptions

  C. Median is easy to understand

  D. Median can be calculated even for open-ended classes

  Correct Answer: D

• Question 4:

  Which of the following best describes internal failure costs?

  A. The economic costs associated with a catastrophic failure of an internal subsystem.

  B. The unavoidable quality system costs associated with the production of any product or service.

  C. The opposite of external failure costs.

  D. The costs resulting from a nonconformance detected before a product or service is provided

  Correct Answer: D

• Question 5:

  The Pareto Principle is associated with 80:20 ratios? (True/False)

  A. True

  B. False

  Correct Answer: A

• Question 6:

  When the design for assembly is being evaluated, all of the following factors should be considered EXCEPT design for:

  A. manufacturability

  B. cost

  C. simplicity

  D. cycle time

  Correct Answer: D

• Question 7:

  A black belt plans to test the performance of workers before and after training. Which of the following hypothesis tests should be used to determine whether the training actually improved the workers' performance?

  A. 2-sample z test

  B. 2-sample t test

  C. Paired t test

  D. F test

  Correct Answer: C

• Question 8:

  Which of the following is most important in evaluating and understanding design intent?

  A. Identifying the functional requirement

  B. Brainstorming failure modes

  C. Conducting computer simulations

  D. Developing FMEA

  Correct Answer: A

• Question 9:

  Which of the following describes the 95% confidence interval of a 20% absentee rate in a department with 30 people?

  A. 6% to 34%

  B. 8% to 32%

  C. 13% to 27%

  D. 17% to 23%

  Correct Answer: A

• Question 10:

  A Black Belt is going to monitor the number of defects on different size samples. Which of the following control charts would be most appropriate?

  A.u

  B.

  np

  C.

  c

  D.

  p

  Correct Answer: A